This document outlines flow through a vertical tube and an annulus. For a vertical tube, the momentum equation is developed showing that the velocity profile is parabolic. Gravity causes a downward acceleration. For an annulus, assumptions are made and the momentum equation is similarly developed. It is shown that the maximum velocity occurs at a distance λ from the inner cylinder and that the velocity profile takes a logarithmic form.
The document discusses key concepts in thermodynamics including:
1. It defines systems, surroundings, boundaries, properties, states, paths, processes, cycles, and equilibrium.
2. It explains heat, work, temperature, and the different mechanisms of heat transfer.
3. It introduces the three laws of thermodynamics and their implications for engineering systems and processes.
Overview
Heat transfer is the science that seeks to predict the energy transfer that may take place between material bodies as result of temperature difference.
Heat is energy is transit, the transfer of energy as heat, however, occurs at the molecular level as result of temperature difference. The symbol (Q) is used for the heat. In engineering applications, the heat unit is (British Thermal Units) or (BTU).
This document provides an overview of boilers and their parts. It begins by defining a boiler as a closed vessel that produces steam from water via fuel combustion. Boilers can be classified based on their axis, whether they use fire tubes or water tubes, and whether combustion is external or internal. Key components that control boiler operation and safety include safety valves, water level indicators, pressure gauges, and blow-off cocks. Accessories like feed pumps, injectors, economizers, air preheaters, and superheaters can increase boiler efficiency. The document outlines the basic working principle of how heat from fuel combustion is transferred to water to produce steam within the closed boiler vessel.
Rotameter calibration report for multiple fluidsSakib Shahriar
The study calibrated a rotameter for measuring the flow rates of multiple fluids. To calibrate the rotameter, the volumetric flow rate of water was measured for different rotameter readings by collecting water in a bucket over timed intervals. From the water flow rate readings, the rotameter coefficient (C) and Reynolds number (Re) were calculated and plotted against each other to obtain the calibration curve, which allows determining the flow rates of other fluids like kerosene from their properties and the rotameter reading.
1. The chapter discusses momentum and forces in fluid flow, including the development of the momentum principle using Newton's second law and the impulse-momentum principle.
2. The momentum equation is developed for two-dimensional and three-dimensional flow through a control volume, accounting for forces, velocities, flow rates, and momentum correction factors.
3. Examples of applying the momentum equation are presented, including forces on bends, nozzles, jets, and vanes.
This document discusses fluid flow and provides information on several topics:
1) It describes laminar and turbulent flow, and introduces the Reynolds number which determines the transition between these two flow regimes.
2) It discusses mass balances and the continuity equation which states that the rate of mass input equals the rate of mass output in steady state flow.
3) It derives the overall energy balance equation based on the first law of thermodynamics and describes how to apply this to steady state flow systems.
4) It introduces the mechanical energy balance equation which is useful for analyzing flowing liquids and accounts for kinetic energy, potential energy, and frictional losses.
Pipe Flow Friction factor in fluid mechanicsUsman Shah
This slide will explain you the chemical engineering terms .Al about the basics of this slide are explain in it. The basics of fluid mechanics, heat transfer, chemical engineering thermodynamics, fluid motions, newtonian fluids, are explain in this process. ,education ,chemical engineerin ,chemical engineering ,fluid mechanics ,heat transfer ,chemical process principles ,macdonald ,kfc ,mazeo ,chemicals ,engineers ,cv formatin ,law ,laptop.
The document discusses key concepts in thermodynamics including:
1. It defines systems, surroundings, boundaries, properties, states, paths, processes, cycles, and equilibrium.
2. It explains heat, work, temperature, and the different mechanisms of heat transfer.
3. It introduces the three laws of thermodynamics and their implications for engineering systems and processes.
Overview
Heat transfer is the science that seeks to predict the energy transfer that may take place between material bodies as result of temperature difference.
Heat is energy is transit, the transfer of energy as heat, however, occurs at the molecular level as result of temperature difference. The symbol (Q) is used for the heat. In engineering applications, the heat unit is (British Thermal Units) or (BTU).
This document provides an overview of boilers and their parts. It begins by defining a boiler as a closed vessel that produces steam from water via fuel combustion. Boilers can be classified based on their axis, whether they use fire tubes or water tubes, and whether combustion is external or internal. Key components that control boiler operation and safety include safety valves, water level indicators, pressure gauges, and blow-off cocks. Accessories like feed pumps, injectors, economizers, air preheaters, and superheaters can increase boiler efficiency. The document outlines the basic working principle of how heat from fuel combustion is transferred to water to produce steam within the closed boiler vessel.
Rotameter calibration report for multiple fluidsSakib Shahriar
The study calibrated a rotameter for measuring the flow rates of multiple fluids. To calibrate the rotameter, the volumetric flow rate of water was measured for different rotameter readings by collecting water in a bucket over timed intervals. From the water flow rate readings, the rotameter coefficient (C) and Reynolds number (Re) were calculated and plotted against each other to obtain the calibration curve, which allows determining the flow rates of other fluids like kerosene from their properties and the rotameter reading.
1. The chapter discusses momentum and forces in fluid flow, including the development of the momentum principle using Newton's second law and the impulse-momentum principle.
2. The momentum equation is developed for two-dimensional and three-dimensional flow through a control volume, accounting for forces, velocities, flow rates, and momentum correction factors.
3. Examples of applying the momentum equation are presented, including forces on bends, nozzles, jets, and vanes.
This document discusses fluid flow and provides information on several topics:
1) It describes laminar and turbulent flow, and introduces the Reynolds number which determines the transition between these two flow regimes.
2) It discusses mass balances and the continuity equation which states that the rate of mass input equals the rate of mass output in steady state flow.
3) It derives the overall energy balance equation based on the first law of thermodynamics and describes how to apply this to steady state flow systems.
4) It introduces the mechanical energy balance equation which is useful for analyzing flowing liquids and accounts for kinetic energy, potential energy, and frictional losses.
Pipe Flow Friction factor in fluid mechanicsUsman Shah
This slide will explain you the chemical engineering terms .Al about the basics of this slide are explain in it. The basics of fluid mechanics, heat transfer, chemical engineering thermodynamics, fluid motions, newtonian fluids, are explain in this process. ,education ,chemical engineerin ,chemical engineering ,fluid mechanics ,heat transfer ,chemical process principles ,macdonald ,kfc ,mazeo ,chemicals ,engineers ,cv formatin ,law ,laptop.
Valves are mechanical devices that control fluid flow through pipes. The document discusses the goals, definition, components, classifications, and materials of valves. Valves are classified according to motion, function, application, and port size. Common valve types include gate valves, globe valves, ball valves, plug valves, butterfly valves, and pinch valves. The document provides details on each type of valve including their definition, application, advantages, variations, and materials. It also provides tips on installation and maintenance of valves.
This document discusses the first law of thermodynamics. It provides:
1) An overview of the first law for closed and open systems, including Joule's experiment that established the law.
2) Key concepts such as the steady flow energy equation, throttling devices, nozzles, and diffusers.
3) Applications of the first law to engineering problems involving fluid flow and energy transfers as work and heat.
This document discusses fluid dynamics and Bernoulli's equation. It begins by defining different forms of energy in a flowing liquid, including kinetic energy, potential energy, pressure energy, and internal energy. It then derives Bernoulli's equation, which states that the total head of a fluid particle remains constant during steady, incompressible flow. The derivation considers forces acting on a fluid particle and uses conservation of energy. Finally, the document presents the general energy equation for steady fluid flow and the specific equation for incompressible fluids using the concepts of total head, head loss, and hydraulic grade line.
Chapter 3 static forces on surfaces [compatibility mode]imshahbaz
1) The document discusses forces on submerged surfaces due to static fluids, including calculating hydrostatic pressures and determining the resultant force and center of pressure.
2) It provides methods for calculating the resultant force on plane and curved surfaces, including using pressure diagrams which graphically represent pressure changes with depth.
3) Examples are given for determining pressures, resultant forces, and centers of pressure on surfaces like vertical walls and combinations of liquids in tanks.
This document presents information on fluid flow through pipes. It discusses major losses due to friction and minor losses due to changes in flow velocity or direction. It provides the Darcy-Weisbach and Chezy's formulas for calculating head loss due to friction. Minor losses include those due to pipe fittings, bends, enlargements, contractions and obstructions. The document also discusses flow through pipes in series, parallel and equivalent configurations.
1. The document discusses 1D steady state heat conduction through two solid plates in contact. It describes how heat transfer occurs through the interface via solid contact spots and gaps, and defines thermal contact resistance.
2. Thermal contact resistance values reported in experiments typically fall between 0.000005 and 0.0005 m2·°C/W. The corresponding thermal contact conductance ranges from 2000 to 200,000 W/m2·°C.
3. The importance of considering thermal contact resistance in heat transfer problems is discussed.
There are four basic types of flow control elements employed in valve design:
1. Move a disc, or plug into or against an orifice.
2. Slide a flat, cylindrical, or spherical surface across an orifice.
3. Rotate a disc or ellipse about a shaft extending across the diameter of an orifice.
4. Move a flexible material into the flow passage.
Gate valves use the second type of flow control by sliding a flat disk across an orifice to start and stop flow but not regulate it. Common valve parts include the body, bonnet, trim (disk, seat, stem), actuator, and packing. The type of valve chosen
This lecture discusses steady state heat transfer through composite slabs. It provides examples of calculating heat transfer rate, thermal resistances, and intermediate temperatures in multi-layer slabs. The examples solve for overall heat transfer coefficient and surface temperatures in furnace walls, double pane windows, and oven walls consisting of multiple materials and layers.
The document discusses reciprocating air compressors. It describes how reciprocating compressors work by using pistons driven by a crankshaft to compress incoming air. The air is compressed from a low pressure to a higher pressure and delivered for storage. Compression requires work input from a prime mover like an engine. Reciprocating compressors are classified as single-acting or double-acting depending on the number of sides of the piston in operation during each cycle. The document provides equations to calculate the work done during compression and defines important concepts like clearance volume, swept volume, and volumetric efficiency.
This document discusses fluid flow, including definitions, types of flow, and factors affecting flow. It defines laminar and turbulent flow, and notes laminar flow is smooth while turbulent flow is disorganized. Pressure, radius, length, viscosity, density, and temperature can impact flow. Clinical applications of flow include devices like rotameters and measurements of breathing.
Unit 6 discusses losses in pipes, including major and minor losses. Major losses are due to friction and calculated using Darcy-Weisbach or Chezy's formulas. Minor losses are due to changes in pipe direction, size, or obstructions and are also calculated using specific formulas. The document also discusses equivalent pipes, pipes in series, pipes in parallel, and two and three reservoir pipe flow analysis problems. Head losses are calculated using friction and minor loss formulas, and continuity and energy equations are used to analyze pipe flows.
The document discusses various pressure measurement instruments such as pressure gauges, pressure switches, differential pressure gauges, and pressure transmitters. It describes the measuring principles, components, installation guidelines, and factors to consider when selecting pressure instruments for applications involving gases, liquids, and other process media. Proper instrument selection and installation is important to ensure accurate pressure measurement over the operating temperature and pressure ranges.
1) The document discusses fluid kinematics, which deals with the motion of fluids without considering the forces that create motion. It covers topics like velocity fields, acceleration fields, control volumes, and flow visualization techniques.
2) There are two main descriptions of fluid motion - Lagrangian, which follows individual particles, and Eulerian, which observes the flow at fixed points in space. Most practical analysis uses the Eulerian description.
3) The Reynolds Transport Theorem allows equations written for a fluid system to be applied to a fixed control volume, which is useful for analyzing forces on objects in a flow. It relates the time rate of change of an extensive property within the control volume to surface fluxes and the property accumulation.
Bernoulli's equation states that the total mechanical energy of an incompressible and inviscid fluid is constant. It relates pressure, velocity, and elevation. Some key applications of Bernoulli's equation include sizing pumps, flow sensors, ejectors, carburetors, siphons, and Pitot tubes. In pumps, the volute converts kinetic energy to pressure energy. Ejectors use pressure energy to accelerate a suction fluid. A Pitot tube measures velocity from the difference in static and dynamic pressure. A carburetor meters fuel flow based on air velocity lowering static pressure. Siphons use Bernoulli's equation to move liquid over an obstruction without pumping.
This document summarizes key concepts in advanced thermodynamics including:
- Pressure-temperature and pressure-volume diagrams for pure fluids and the phase change curves and points they depict.
- Equations of state relating pressure, volume, and temperature for homogeneous fluids in equilibrium.
- Properties and examples of ideal gas behavior and the virial equation of state for real gases.
- Calculation of work, heat, internal energy, and enthalpy changes for various thermodynamic processes involving ideal gases including isothermal, adiabatic, constant pressure, and throttling processes.
Methods to determine pressure drop in an evaporator or a condenserTony Yen
This articles aims to explain how one can relatively easily calculate the pressure drop within a condenser or an evaporator, where two-phase flow occurs and the Navier-Stokes equation becomes very tedious.
This document provides an introduction to engineering thermodynamics. It defines key concepts like systems, properties, processes, and the first law of thermodynamics. Specific topics covered include the classification of thermodynamic systems as closed or open, homogeneous or heterogeneous. The document also discusses intensive and extensive properties, pressure, temperature, and the gas laws of Boyle, Charles, and Gay-Lussac. Common thermodynamic processes like isothermal, isobaric, isochoric, and adiabatic processes are defined. The first law of thermodynamics relating heat, work, and changes in internal energy is stated.
The document discusses accumulator systems which are used to operate blowout preventers (BOPs) in the event of a power failure. It defines accumulators as pressure vessels that store hydraulic fluid energy. The main types are gas-charged bladders, diaphragms, and pistons. Accumulator systems have multiple independent power sources like hydraulic bottles, pneumatics, and electricity. They maintain sufficient pressure to operate all BOP rams. The document provides examples of sizing calculations to ensure accumulators provide adequate fluid volume to close BOP components based on their specific pressures and volumes.
This document discusses fuels and combustion. It defines fuels and combustion, describes types of fuels like solid, liquid and gaseous. It explains complete and incomplete combustion, oxidation of carbon, hydrogen and sulfur in combustion reactions. It discusses air composition, theoretical air requirements, combustion of hydrocarbon fuels. It also covers properties of fuels like heating value, viscosity and methods of determining heating value through bomb calorimeter and gas calorimeter.
This document discusses laminar and turbulent flow, the Reynolds number, and head loss relationships. It defines laminar flow as having non-intersecting particle paths with viscous forces dominating, while turbulent flow has intersecting paths and inertial forces dominating. The Reynolds number is the ratio of inertial to viscous forces. Head loss relationships are developed relating head loss to velocity based on the Darcy-Weisbach equation for pipe flow. Shear stress distributions in pipes are also examined.
Basic equation of fluid flow mechan.pptxAjithPArun1
This document discusses the basic equations of fluid flow, including:
- The continuity equation, which states that the rate of mass entering a fluid system equals the rate leaving under steady conditions.
- The momentum equation, which relates the rate of change of momentum of a fluid to the forces acting on it.
- Bernoulli's equation, which states that the total head (pressure head, velocity head, and elevation head) remains constant in an inviscid, incompressible, steady flow.
Valves are mechanical devices that control fluid flow through pipes. The document discusses the goals, definition, components, classifications, and materials of valves. Valves are classified according to motion, function, application, and port size. Common valve types include gate valves, globe valves, ball valves, plug valves, butterfly valves, and pinch valves. The document provides details on each type of valve including their definition, application, advantages, variations, and materials. It also provides tips on installation and maintenance of valves.
This document discusses the first law of thermodynamics. It provides:
1) An overview of the first law for closed and open systems, including Joule's experiment that established the law.
2) Key concepts such as the steady flow energy equation, throttling devices, nozzles, and diffusers.
3) Applications of the first law to engineering problems involving fluid flow and energy transfers as work and heat.
This document discusses fluid dynamics and Bernoulli's equation. It begins by defining different forms of energy in a flowing liquid, including kinetic energy, potential energy, pressure energy, and internal energy. It then derives Bernoulli's equation, which states that the total head of a fluid particle remains constant during steady, incompressible flow. The derivation considers forces acting on a fluid particle and uses conservation of energy. Finally, the document presents the general energy equation for steady fluid flow and the specific equation for incompressible fluids using the concepts of total head, head loss, and hydraulic grade line.
Chapter 3 static forces on surfaces [compatibility mode]imshahbaz
1) The document discusses forces on submerged surfaces due to static fluids, including calculating hydrostatic pressures and determining the resultant force and center of pressure.
2) It provides methods for calculating the resultant force on plane and curved surfaces, including using pressure diagrams which graphically represent pressure changes with depth.
3) Examples are given for determining pressures, resultant forces, and centers of pressure on surfaces like vertical walls and combinations of liquids in tanks.
This document presents information on fluid flow through pipes. It discusses major losses due to friction and minor losses due to changes in flow velocity or direction. It provides the Darcy-Weisbach and Chezy's formulas for calculating head loss due to friction. Minor losses include those due to pipe fittings, bends, enlargements, contractions and obstructions. The document also discusses flow through pipes in series, parallel and equivalent configurations.
1. The document discusses 1D steady state heat conduction through two solid plates in contact. It describes how heat transfer occurs through the interface via solid contact spots and gaps, and defines thermal contact resistance.
2. Thermal contact resistance values reported in experiments typically fall between 0.000005 and 0.0005 m2·°C/W. The corresponding thermal contact conductance ranges from 2000 to 200,000 W/m2·°C.
3. The importance of considering thermal contact resistance in heat transfer problems is discussed.
There are four basic types of flow control elements employed in valve design:
1. Move a disc, or plug into or against an orifice.
2. Slide a flat, cylindrical, or spherical surface across an orifice.
3. Rotate a disc or ellipse about a shaft extending across the diameter of an orifice.
4. Move a flexible material into the flow passage.
Gate valves use the second type of flow control by sliding a flat disk across an orifice to start and stop flow but not regulate it. Common valve parts include the body, bonnet, trim (disk, seat, stem), actuator, and packing. The type of valve chosen
This lecture discusses steady state heat transfer through composite slabs. It provides examples of calculating heat transfer rate, thermal resistances, and intermediate temperatures in multi-layer slabs. The examples solve for overall heat transfer coefficient and surface temperatures in furnace walls, double pane windows, and oven walls consisting of multiple materials and layers.
The document discusses reciprocating air compressors. It describes how reciprocating compressors work by using pistons driven by a crankshaft to compress incoming air. The air is compressed from a low pressure to a higher pressure and delivered for storage. Compression requires work input from a prime mover like an engine. Reciprocating compressors are classified as single-acting or double-acting depending on the number of sides of the piston in operation during each cycle. The document provides equations to calculate the work done during compression and defines important concepts like clearance volume, swept volume, and volumetric efficiency.
This document discusses fluid flow, including definitions, types of flow, and factors affecting flow. It defines laminar and turbulent flow, and notes laminar flow is smooth while turbulent flow is disorganized. Pressure, radius, length, viscosity, density, and temperature can impact flow. Clinical applications of flow include devices like rotameters and measurements of breathing.
Unit 6 discusses losses in pipes, including major and minor losses. Major losses are due to friction and calculated using Darcy-Weisbach or Chezy's formulas. Minor losses are due to changes in pipe direction, size, or obstructions and are also calculated using specific formulas. The document also discusses equivalent pipes, pipes in series, pipes in parallel, and two and three reservoir pipe flow analysis problems. Head losses are calculated using friction and minor loss formulas, and continuity and energy equations are used to analyze pipe flows.
The document discusses various pressure measurement instruments such as pressure gauges, pressure switches, differential pressure gauges, and pressure transmitters. It describes the measuring principles, components, installation guidelines, and factors to consider when selecting pressure instruments for applications involving gases, liquids, and other process media. Proper instrument selection and installation is important to ensure accurate pressure measurement over the operating temperature and pressure ranges.
1) The document discusses fluid kinematics, which deals with the motion of fluids without considering the forces that create motion. It covers topics like velocity fields, acceleration fields, control volumes, and flow visualization techniques.
2) There are two main descriptions of fluid motion - Lagrangian, which follows individual particles, and Eulerian, which observes the flow at fixed points in space. Most practical analysis uses the Eulerian description.
3) The Reynolds Transport Theorem allows equations written for a fluid system to be applied to a fixed control volume, which is useful for analyzing forces on objects in a flow. It relates the time rate of change of an extensive property within the control volume to surface fluxes and the property accumulation.
Bernoulli's equation states that the total mechanical energy of an incompressible and inviscid fluid is constant. It relates pressure, velocity, and elevation. Some key applications of Bernoulli's equation include sizing pumps, flow sensors, ejectors, carburetors, siphons, and Pitot tubes. In pumps, the volute converts kinetic energy to pressure energy. Ejectors use pressure energy to accelerate a suction fluid. A Pitot tube measures velocity from the difference in static and dynamic pressure. A carburetor meters fuel flow based on air velocity lowering static pressure. Siphons use Bernoulli's equation to move liquid over an obstruction without pumping.
This document summarizes key concepts in advanced thermodynamics including:
- Pressure-temperature and pressure-volume diagrams for pure fluids and the phase change curves and points they depict.
- Equations of state relating pressure, volume, and temperature for homogeneous fluids in equilibrium.
- Properties and examples of ideal gas behavior and the virial equation of state for real gases.
- Calculation of work, heat, internal energy, and enthalpy changes for various thermodynamic processes involving ideal gases including isothermal, adiabatic, constant pressure, and throttling processes.
Methods to determine pressure drop in an evaporator or a condenserTony Yen
This articles aims to explain how one can relatively easily calculate the pressure drop within a condenser or an evaporator, where two-phase flow occurs and the Navier-Stokes equation becomes very tedious.
This document provides an introduction to engineering thermodynamics. It defines key concepts like systems, properties, processes, and the first law of thermodynamics. Specific topics covered include the classification of thermodynamic systems as closed or open, homogeneous or heterogeneous. The document also discusses intensive and extensive properties, pressure, temperature, and the gas laws of Boyle, Charles, and Gay-Lussac. Common thermodynamic processes like isothermal, isobaric, isochoric, and adiabatic processes are defined. The first law of thermodynamics relating heat, work, and changes in internal energy is stated.
The document discusses accumulator systems which are used to operate blowout preventers (BOPs) in the event of a power failure. It defines accumulators as pressure vessels that store hydraulic fluid energy. The main types are gas-charged bladders, diaphragms, and pistons. Accumulator systems have multiple independent power sources like hydraulic bottles, pneumatics, and electricity. They maintain sufficient pressure to operate all BOP rams. The document provides examples of sizing calculations to ensure accumulators provide adequate fluid volume to close BOP components based on their specific pressures and volumes.
This document discusses fuels and combustion. It defines fuels and combustion, describes types of fuels like solid, liquid and gaseous. It explains complete and incomplete combustion, oxidation of carbon, hydrogen and sulfur in combustion reactions. It discusses air composition, theoretical air requirements, combustion of hydrocarbon fuels. It also covers properties of fuels like heating value, viscosity and methods of determining heating value through bomb calorimeter and gas calorimeter.
This document discusses laminar and turbulent flow, the Reynolds number, and head loss relationships. It defines laminar flow as having non-intersecting particle paths with viscous forces dominating, while turbulent flow has intersecting paths and inertial forces dominating. The Reynolds number is the ratio of inertial to viscous forces. Head loss relationships are developed relating head loss to velocity based on the Darcy-Weisbach equation for pipe flow. Shear stress distributions in pipes are also examined.
Basic equation of fluid flow mechan.pptxAjithPArun1
This document discusses the basic equations of fluid flow, including:
- The continuity equation, which states that the rate of mass entering a fluid system equals the rate leaving under steady conditions.
- The momentum equation, which relates the rate of change of momentum of a fluid to the forces acting on it.
- Bernoulli's equation, which states that the total head (pressure head, velocity head, and elevation head) remains constant in an inviscid, incompressible, steady flow.
This document discusses open channel flow, including:
1) Key parameters like hydraulic radius, channel roughness, and types of flow profiles.
2) Empirical equations for open channel flow including Chezy and Manning's equations.
3) Concepts of critical flow including critical depth, specific energy, and the importance of the Froude number.
4) Measurement techniques for discharge like weirs and sluice gates.
5) Gradually and rapidly varied flow, water surface profiles, and hydraulic jumps.
The document discusses flow in circular pipes. It outlines the objectives of measuring pressure drop in smooth, rough and packed pipes as a function of flow rate. It aims to correlate these measurements in terms of friction factor and Reynolds number. The apparatus used includes pipe networks, rotameters and manometers. Laminar and turbulent flow are examined theoretically using concepts like boundary layers, velocity profiles, friction factors and Reynolds number. Flow in valves, expansions, contractions and venturi/orifice meters is also analyzed. Head losses are shown to depend on length, velocity, diameter and roughness. Pipes are ubiquitous in nature, infrastructure and engineering systems.
This document contains diagrams and equations related to fluid mechanics concepts such as:
- Pressure variations in fluids undergoing acceleration or rigid body rotation
- Free surface profiles and pressure distributions in fluids in rotating or accelerated containers
- Equations relating pressure, depth, acceleration/rotation, and density for both static and dynamic fluid situations
Open Channel Flow of irrigation and Drainage Department .pptiphone4s4
This document provides an overview of open channel flow, including relevant topics such as uniform flow, critical flow, gradually varied flow, and classification of flows. It also discusses important relationships for open channel flow, including the conservation of energy and momentum equations, dimensional analysis, and equations for discharge as a function of depth such as the Manning, Chezy, and Darcy-Weisbach equations. Key concepts introduced are the specific energy of a channel, critical depth, and the relationships between flow parameters at critical depth in a rectangular channel.
This chapter discusses steady fluid flow through pipes and pipe systems. It covers topics like laminar and turbulent flow, the Reynolds number, pressure drop calculations for straight pipes, and analyzing full pipe systems. The key points are:
- Laminar flow is smooth and orderly while turbulent flow is irregular with fluctuations. The Reynolds number determines the transition between these regimes.
- Pressure drop in pipes is calculated using Darcy's equation which relates head loss to flow properties using the friction factor.
- For laminar flow, the Hagen-Poiseuille equation can also be used to directly relate head loss to flow properties and pipe dimensions.
- Pipe networks with multiple branches can be analyzed by considering pressure
The document discusses laminar and turbulent flow in pipes. Laminar flow occurs at low velocities where fluid particle paths do not intersect and viscous forces dominate. Turbulent flow occurs at higher velocities where paths do intersect and inertial forces dominate. The transition from laminar to turbulent occurs around a Reynolds number of 2000. Head loss due to friction is directly proportional to velocity for laminar flow but varies with velocity to the power of 1.75-2 for turbulent flow. Reynolds number characterizes the transition based on the ratio of inertial to viscous forces.
Fluid MechanicsLosses in pipes dynamics of viscous flowsMohsin Siddique
This document discusses fluid flow in pipes. It defines the Reynolds number and explains laminar and turbulent flow regimes. It also covers the Darcy-Weisbach equation for calculating head losses due to pipe friction. The friction factor is determined using Moody diagrams based on Reynolds number and relative pipe roughness. Examples are provided to calculate friction factor, head loss, and flow rate for different pipe flow conditions.
This document summarizes the results of computational modeling of gas flow in a Holweck pump. The pump geometry was modeled as 2D grooved channels with varying dimensions and rarefaction parameters. Discrete velocity methods were used to solve the Boltzmann equation for the gas distribution function. Mass flow rates were computed for 126 combinations of channel length, width, depth and rarefaction parameter. The results showed a Knudsen minimum in the mass flow rate around a rarefaction parameter of 1, consistent with theory. Normalizing the results matched published data, validating the computational approach.
This document discusses boundary layer flow over a flat plate. It begins by defining the governing equations and boundary conditions for two-dimensional, incompressible, laminar flow over a flat plate. Dimensionless parameters including the Reynolds number are introduced. Similarity solutions for both the laminar velocity and thermal boundary layers are presented, with the Blasius solution provided for the velocity profile. Methods for evaluating heat transfer via empirical correlations or theoretical solutions are overviewed. Transition to turbulent flow and considerations for mixed laminar-turbulent boundary layers are also covered at a high level.
This document provides information about pipe flow and head losses in civil engineering. It discusses:
1. Types of pipe flow including steady/unsteady, uniform/non-uniform, laminar/turbulent.
2. Forces in pipe flow including pressure, gravity, inertia. Conservation equations for mass and momentum are presented.
3. Energy head in pipe flow including kinetic, pressure, and potential (elevation) heads. The Bernoulli equation relating these is derived.
Major and minor head losses are also summarized. Darcy-Weisbach equation for calculating major head losses due to pipe friction is presented.
- The document discusses different types of fluid flow in reservoirs, including single-phase, two-phase, and three-phase flow. It also discusses different reservoir geometries that fluid flow can take, including radial, linear, spherical, and hemispherical flow.
- Mathematical expressions used to model reservoir performance and pressure behavior vary depending on the number of mobile fluid phases present.
- Reservoir shape significantly impacts flow behavior, though irregular boundaries usually require numerical simulation; standard geometries include radial, linear, spherical and hemispherical flow.
1. Entropy is a measure of molecular disorder or randomness in a system. Higher entropy corresponds to higher disorder.
2. The Clausius inequality states that the integral of heat transferred divided by temperature around any cyclic process is always less than or equal to zero. This inequality is a consequence of the second law of thermodynamics.
3. Entropy changes can be evaluated graphically using property diagrams like temperature-entropy and enthalpy-entropy diagrams. These diagrams are useful for analyzing both reversible and irreversible processes.
1) An inductor resists changes in current and has an impedance of iωL.
2) In an RLC circuit, the behavior is determined by the time constant L/R. If L/R is small, the circuit is overdamped; if L/R is large, it is underdamped and will ring.
3) An RLC circuit can act as a bandpass filter, with peak gain occurring at the resonant frequency of 1/√LC. The quality factor Q relates to the bandwidth around the peak gain.
This document provides information about fluid flow through pipes, including definitions and equations. It defines types of fluid flow such as steady/unsteady, uniform/non-uniform, laminar/turbulent. It also defines compressible/incompressible flow and rotational/irrotational flow. Bernoulli's equation and its assumptions are described. Darcy-Weisbach and Hagen-Poiseuille equations for head loss due to friction are given. Reynolds number range for laminar and turbulent flow is provided. Shear stress, velocity distribution, and average velocity equations are listed. Factors affecting frictional head loss are also mentioned.
Exact Solutions for MHD Flow of a Viscoelastic Fluid with the Fractional Bur...IJMER
This paper presents an analytical study for the magnetohydrodynamic (MHD) flow of a
generalized Burgers’ fluid in an annular pipe. Closed from solutions for velocity is obtained by using finite
Hankel transform and discrete Laplace transform of the sequential fractional derivatives. Finally, the
figures are plotted to show the effects of different parameters on the velocity profile.
The document provides an introduction to open channel flow. It defines open channel flow and distinguishes it from pipe flow. Open channels are exposed to atmospheric pressure and have a cross-sectional area that varies depending on flow parameters, while pipe flow is enclosed and has a constant cross-sectional area. The document discusses different types of channel flows including steady/unsteady and uniform/non-uniform flow. It also defines geometric elements of open channel sections such as depth, width, wetted perimeter, and hydraulic radius. Critical depth is introduced as the depth where specific energy is minimum. Specific energy, defined as the total energy per unit weight of flow above the channel bottom, is also summarized.
This document discusses drilling hydraulics and fluid flow concepts. It covers topics like energy balance, flow through nozzles, hydraulic horsepower, conservation laws, average fluid velocity equations, the law of conservation of energy, determining pressure at different points, nozzle flow, hydraulic impact force, rheological fluid models including Newtonian, Bingham plastic and power-law models, laminar and turbulent flow, critical Reynolds number, pump pressure calculations, and pressure losses in different components like drill pipe, drill collars and bit nozzles. Diagrams illustrate concepts like velocity profiles, flow patterns and fraction factors. Equations are provided for calculations.
Unlocking WhatsApp Marketing with HubSpot: Integrating Messaging into Your Ma...Niswey
50 million companies worldwide leverage WhatsApp as a key marketing channel. You may have considered adding it to your marketing mix, or probably already driving impressive conversions with WhatsApp.
But wait. What happens when you fully integrate your WhatsApp campaigns with HubSpot?
That's exactly what we explored in this session.
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This presentation is a curated compilation of PowerPoint diagrams and templates designed to illustrate 20 different digital transformation frameworks and models. These frameworks are based on recent industry trends and best practices, ensuring that the content remains relevant and up-to-date.
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The BCG Strategy Palette
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Digital Transformation Compass
Four Levels of Digital Maturity
Design Thinking Framework
Business Model Canvas
Customer Journey Map
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3. Flow Through a Vertical Tube
The tube is oriented
vertically.
What will be the
velocity profile of a
fluid whose direction
of flow is in the +z-
direction
(downwards)?
4. Flow Through a Vertical Tube
Same system, but
this time gravity will
also cause
momentum flux.
5. Flow Through a Vertical Tube
rate of momentum rate of momentum
force of gravity
in by molecular out by molecular 0
acting on system
transport transport
0
1 2
:
:
: + (whypositive?)
z z L
rz rzr r r
pressure PA PA
net momentum flux A A
gravity gV
0
Adding all terms together:
2 2 2 2
(2 ) 0
rz rzz z L r r r
P r r P r r rL rL
g r rL
6. Flow Through a Vertical Tube
0
0
Dividing by 2 :
0
Let 0 :
0
rz rzz z L r r r
L
rz
L r
r rP P
r gr
L r
r
P P d
r r gr
L dr
0
2 2 2 2 (2 ) 0rz rzz z L r r r
P r r P r r rL rL g r rL
7. Flow Through a Vertical Tube
0
0L
rz
P P d
r r gr
L dr
0 0
Rewriting:
(0)L L
rz
d P P P P g gL
r g r r
dr L L L
We let: z zP gz 0 L
rz
d
r r
dr L
0 (0) L
rz
d P g P gL
r r
dr L L
8. Flow Through a Vertical Tube
0 L
rz
d
r r
dr L
0 L
rz
d P P
r r
dr L
Flow through a
circular tube
Flow through a
vertical tube
9. Flow Through a Vertical Tube
2 20
4
L
zv R r
L
20
32
L
avev D
L
Hagen-Poiseuille
Equation
11. Flow Through an Annulus
Liquid is flowing upward
through an annulus (space
between two concentric
cylinders)
Important quantities:
R : radius of outer cylinder
κR : radius of inner
cylinder
12. Flow Through an Annulus
Assumptions:
1. Steady-state flow
2. Incompressible fluid
3. Only Vz component is
significant
4. At the solid-liquid interface,
no-slip condition
5. Significant gravity effects
6. Vmax is attained at a
distance λR from the
center of the inner cylinder
(not necessarily the center)
13. Flow Through an Annulus
rate of momentum rate of momentum
force of gravity
in by molecular out by molecular 0
acting on system
transport transport
0
1 2
:
:
: (whynegative?)
z z L
rz rzr r r
pressure PA PA
net momentum flux A A
gravity gV
0
Adding all terms together:
2 2 2 2
(2 ) 0
rz rzz z L r r r
P r r P r r rL rL
g r rL
14. Flow Through an Annulus
0
0L
rz
P P d
r r gr
L dr
0 0
Rewriting:
(0)L L
rz
d P P P P g gL
r g r r
dr L L L
We let: z zP gz 0 L
rz
d
r r
dr L
0 (0) L
rz
d P g P gL
r r
dr L L
15. Flow Through an Annulus
0 L
rz
d
r r
dr L
0
20
1
0 1
Solving:
2
2
L
rz
L
rz
L
rz
d
r r
dr L
r r C
L
C
r
L r
BOUNDARY CONDITION!
At a distance λR from the center of
the inner cylinder, Vmax is attained in
the annulus, or zero momentum flux.
0 1
0
2
L C
R
L R
20
1
2
L
C R
L
16. Flow Through an Annulus
0 2
Rewriting:
2
L
rz
R r R
L R r
2
0 0
2 2
L L
rz
R
r
L L r
From the definition of flux:
z
rz
dv
dr
0 2
2
Lz
Rdv r R
dr L R r
17. Flow Through an Annulus
0 2
2
Lz
Rdv r R
dr L R r
2
0 2
2
Solving:
1
ln
2 2
L
z
R r
v R r C
L R
18. Flow Through an Annulus
2
0 2
2
1
ln
2 2
L
z
R r
v R r C
L R
22
0 2
2
Rewriting:
2 ln
4
L
z
R r R
v r C
L R R
Take out R/2
Multiply r in log term
by R/R (or 1)
Expand log term
Lump all constants
into C2
22
0 2
22 ln ln( )
4
L
z
R r r
v R C
L R R
22
0 2
22 ln
4
L
z
R r r
v C
L R R
19. Flow Through an Annulus
22
0 2
22 ln
4
L
z
R r r
v C
L R R
We have two unknown constants: C2 and λ
We can use two boundary conditions:
No-slip Conditions
At r = κR, vz = 0
At r = R, vz = 0
20. Flow Through an Annulus
22
0 2
22 ln
4
L
z
R r r
v C
L R R
2
0 2 2
2
2 2
2
Using B.C. #1:
0 2 ln
4
0 2 ln
L R
C
L
C
2
2
2
1
1
2
ln
C
2
0
2
2
Using B.C. #2:
0 1
4
0 1
L R
C
L
C
21. Flow Through an Annulus
22
0 2
22 ln
4
L
z
R r r
v C
L R R
2
2
2
1
1
2
ln
C
22 2
0 1
ln 1
4 ln
L
z
R r r
v
L R R
22. Shell Balances
1. Identify all the forces that influence the flow
(pressure, gravity, momentum flux) and their
directions. Set the positive directions of your axes.
2. Create a shell with a differential thickness across the
direction of the flux that will represent the flow
system.
3. Identify the areas (cross-sectional and surface areas)
and volumes for which the flow occurs.
4. Formulate the shell balance equation and the
corresponding differential equation for the
momentum flux.
23. Shell Balances
5. Identify all boundary conditions (solid-liquid, liquid-
liquid, liquid-free surface, momentum flux values at
boundaries, symmetry for zero flux).
6. Integrate the DE for your momentum flux and
determine the values of the constants using the BCs.
7. Insert Newton’s law (momentum flux definition) to
get the differential equation for velocity.
8. Integrate the DE for velocity and determine values of
constants using the BCs.
9. Characterize the flow using this velocity profile.
24. Shell Balances
Important Assumptions*
1. The flow is always assumed to be at steady-
state.
2. Neglect entrance and exit effects. The flow is
always assumed to be fully-developed.
3. The fluid is always assumed to be
incompressible.
4. Consider the flow to be unidirectional.
*unless otherwise stated
26. Outline
1.Velocity Profiles in Pipes
2.Pressure Drop and Friction Loss (Laminar
Flow)
3.Friction Loss (Turbulent Flow)
4.Frictional Losses in Piping Systems
27. Velocity Profiles in Pipes
Recall velocity profile in a circular tube:
1. What is the shape of this profile?
2. The maximum occurs at which region?
3. What is the average velocity of the fluid
flowing through this pipe?
2 20
4
L
z
P P
v R r
L
29. Velocity Profiles in Pipes
Velocity Profile in a Pipe:
Average Velocity of a Fluid in a Pipe:
2 20
4
L
z
P P
v R r
L
20
32
L
ave
P P
v D
L
31. Outline
1.Velocity Profiles in Pipes
2.Pressure Drop and Friction Loss (Laminar
Flow)
3.Friction Loss (Turbulent Flow)
4.Frictional Losses in Piping Systems
33. Hagen-Poiseuille Equation
0 2
32 ave
L
Lv
P P
D
Pressure drop / Pressure loss (P0 – PL):
Pressure lost due to skin friction
34. Friction Loss
0 2
32 ave
L
Lv
P P
D
In terms of energy
lost per unit mass: 2
32O L ave
f
P P Lv
F
D
Mechanical energy lost due to friction in
pipe (because of what?)
35. Friction Factor
Definition: Drag force per wetted surface
unit area (or shear stress at the surface)
divided by the product of density times
velocity head
0
2 2
2 2
L C SS
P P A A
f
v v
36. Friction Factor
2
4
2
f
F
c c
F L v
f
g D g
Frictional force/loss head is proportional
to the velocity head of the flow and to
the ratio of the length to the diameter of
the flow stream
37. Friction Factor for Laminar Flow
Consider the Hagen-Poiseuille equation
(describes laminar flow) and the
definition of the friction factor:
Prove:
20
32
L
ave
P P
v D
L
2
4
2
f O L
F
c c
F P P L v
f
g g D g
Re
16
Ff
N
Valid only for laminar flow
38. Outline
1.Velocity Profiles in Pipes
2.Pressure Drop and Friction Loss (Laminar
Flow)
3.Friction Loss (Turbulent Flow)
4.Frictional Losses in Piping Systems
39. Friction Factor for Turbulent
Flow
1. Friction factor is dependent on NRe and
the relative roughness of the pipe.
2. The value of fF is determined
empirically.
2
4
2
f
F
c c
F L v
f
g D g
40. Friction Factor for Turbulent
Flow
How to compute/find the value of the friction factor for
turbulent flow:
1. Use Moody diagrams.
- Friction factor vs. Reynolds number with a series of
parametric curves related to the relative roughness
2. Use correlations that involve the friction factor f.
- Blasius equation, Colebrook formula, Churchill
equation (Perry 8th Edition)
41. Moody Diagrams
Important notes:
1. Both fF and NRe are plotted in logarithmic scales.
Some Moody diagrams show fD (Darcy friction
factor). Make the necessary conversions.
2. No curves are shown for the transition region.
3. Lowest possible friction factor for a given NRe in
turbulent flow is shown by the smooth pipe line.
42.
43.
44. 1. Blasius equation for turbulent flow in smooth
tubes:
2. Colebrook formula
0.25
Re
0.079
Ff
N
5
Re4000 10N
10
Re
1 2.51
2log
3.7D D
Df N f
Friction Factor Correlations
45. 3. Churchill equation (Colebrook formula explicit in fD)
4. Swamee-Jain correlation
0.9
10
Re
1 0.27 7
2log
D
D Nf
10 0.9
Re
0.25
5.74
2log
3.7
Df
D N
Friction Factor Correlations
46. Materials of Construction Equivalent Roughness (m)
Copper, brass, lead (tubing) 1.5 E-06
Commercial or welded steel 4.6 E-05
Wrought iron 4.6 E-05
Ductile iron – coated 1.2 E-04
Ductile iron – uncoated 2.4 E-04
Concrete 1.2 E-04
Riveted Steel 1.8 E-03
Equivalent Roughness, ε
47. Instead of deriving new correlations for f, an approximation
is developed for an equivalent diameter, Deq, which may be
used to calculate NRe and f.
where RH = hydraulic radius
S = cross-sectional area
Pw = wetted perimeter: sum of the length
of the boundaries of the cross-section
actually in contact with the fluid
4 4eq H
w
S
D R
P
Frictional Losses for Non-Circular
Conduits
48. Determine the equivalent diameter of the
following conduit types:
1. Annular space with outside diameter Do and
inside diameter Di
2. Rectangular duct with sides a and b
3. Open channels with liquid depth y and liquid
width b
4 4eq H
w
S
D R
P
Equivalent Diameter (Deq)