The Powerpoint presentation discusses about the Introduction to CFD and its Applications in various fields as an Introductory topic for Mechanical Engg. Students in General.
The Powerpoint presentation discusses about the Introduction to CFD and its Applications in various fields as an Introductory topic for Mechanical Engg. Students in General.
Computational Fluid Dynamics (CFD) is the simulation of fluids engineering systems using modeling [mathematical physical problem formulation) and numerical methods (discretization methods, solvers, numerical parameters, and grid generations, etc]
The presentation gives glances of the importance of CFD analysis in engineering design with an illustration/ case study. For more details, follow the webinar "Role of CFD in Engineering Design" on https://www.learncax.com/knowledge-base/blog/by-author/ganesh-visavale
Computational Fluid Dynamics (CFD) is the simulation of fluids engineering systems using modeling [mathematical physical problem formulation) and numerical methods (discretization methods, solvers, numerical parameters, and grid generations, etc]
The presentation gives glances of the importance of CFD analysis in engineering design with an illustration/ case study. For more details, follow the webinar "Role of CFD in Engineering Design" on https://www.learncax.com/knowledge-base/blog/by-author/ganesh-visavale
Computational fluid dynamics (CFD) is a branch of fluid mechanics that uses numerical analysis and data structures to analyze and solve problems that involve fluid flows.
Cfd Studies of Two Stroke Petrol Engine ScavengingIJERA Editor
This project deals with the numerical analysis of 2 stroke engine scavenging in two cases. One with an existing condition (Flat headed pistons) and another with a new design (Dome headed piston) .The numerical analysis is done with help of CFD software ANSYS FLUENT 14.5. Here, the modeling of engine piston with flat headed type and with dome headed types was done in workbench. In ANSYS FLUENT after the geometrical design, for the dynamic motion meshing is used and set up species transport model also. At first the scavenging effect of flat headed piston is analyzed. Later the simulation of piston with dome headed type was also checked. Analyzing the variations from each and selected the best method for scavenging. Finally the scavenging efficiency is calculated for both type arrangements.
ANALYSIS OF VORTEX INDUCED VIBRATION USING IFSIJCI JOURNAL
Interaction of fluid structure (IFS) is one of the upcoming field in calculation and simulation of multiphysics problems. IFS play an important role in calculating offshore structures deformations caused by the vortex induced loads. The complexity interaction nature of fluid around the solid geometries pose the difficulties in the analysis, but IFS analysis technique overshadow the challenges. In this paper, Analysis is done by considering a cylindrical member which is similar to the part of offshore platform. The IFS analysis is done by using the commercial package ANSYS 14.0. The Vortex induced loads simulation with IFS is purely a mesh dependent, for that we have to simulate many problems for getting optimum grid size. Computational Fluid Dynamics (CFD) analysis of a two dimensional model have been done and the obtained results were validated with the literature findings. CFD analysis is performed on the extruded version of the two dimensional mesh and the results were compared with the previously obtained two dimensional results. Preliminary IFS analysis is done by coupling the structural and fluid solvers together at smaller time steps and the dynamic response of the structural member to the periodically varying Vortex induced vibrations (VIV) loads were observed and studied.
Summer Training 2015 at Alternate Hydro Energy CenterKhusro Kamaluddin
This is the presentation i gave to "Defend" my Summer Training at AHEC IIT Roorkee During Summer 2015. I gave this presentation in my college during my final year. Indeed the most lengthy i ever gave .
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
2. Outline
● What is CFD?
● History of CFD
● Why to use CFD?
● Purpose and AIM
● Applications
● Physics
● Governing Equations
● Basics of Fluids
● How It Works
● Limitations
● Software
3. What is CFD?
Computational Fluid dynamics(CFD) is the
science of predicting fluid flow, heat transfer,
mass transfer, chemical reactions, and related
phenomena by solving the mathematical
equations.
We are interested in the forces (pressure, viscous forces, stress etc.) , velocity
field, temperature distribution
4. History of CFD
Historically Analytic Fluid Dynamics(AFD) and Experimental
Fluid Dynamics(EFD) was used.
Since 1940s analytical solution to most fluid dynamics
problems was available for idealized solutions. Methods for
solution of ODEs or PDEs were conceived only on paper due
to absence of personal computers.
CFD has become feasible due to the advantage of high
speed digital computers
5. Why to use CFD?
● Relatively low cost.
CFD simulations are relatively inexpensive, and costs are likely to decrease
as computers become more powerful.
● Speed
CFD simulations can be executed in a short period of time.
● Ability to simulate real conditions.
CFD provides the ability to theoretically simulate any physical condition.
● Comprehensive information
CFD allows the analyst to examine a large number of locations.
6. Purpose and Aim
-Analysis and Design
● Simulation-based design instead of “build and test”
-More cost effectively and more rapidly than with experiments.
-CFD solution provides high-fidelity database for interrogation of flow field.
● Simulation of physical Fluid phenomena that are difficult to be measured by
experiments
-Scale simulations (e.g., full scale ships, airplanes)
-Hazards(e.g., explosions, radiation, pollution)
21. Basic Fluid Motion
1) Translation
Motion of the centre of mass
2) Dilatation
Volume change
3)Rotation
About one, two or 3 axes
4)Shear Strain
22. Newtonian and Non Newtonian Fluids
A newtonian fluids viscosity remains constant, no
matter the amount of shear applied for a constant
temperature. These fluids have a linear
relationship between viscosity and shear stress.
In non-newtonian fluid viscosity changes with
respect to the amount of shear or stress applied
to the fluid.
23. Compressible and Incompressible flow
A fluid flow is said to be compressible when
the pressure variation in the flow field is large
enough to cause substantial changes in the
density of fluid.
24. Viscous and Inviscid flow
In a viscous flow the fluid friction has significant
effects on the solution where the viscous forces
are more significant than inertial forces.
25. Laminar Flow: The flow of a fluid when each
particle of the fluid follows a smooth path, paths
which never interfere with one another. One result of
laminar flow is that the velocity of the fluid is constant
at any point in the fluid.
Turbulent Flow: The irregular flow that is characterized
By tiny whirlpool regions. The velocity of this fluid
is definitely not constant at every point.
Laminar and Turbulent flow
26. How CFD Works?
● Appropriate initial and boundary conditions are provided for
the problem.
● CFD applies numerical method called discretization to
develop approximations of the governing equations of fluid
mechanics in the fluid region of interest.
● The solution is post-processed to extract quantities of
interest (e.g. lift, drag, torque, heat transfer, separation,
pressure loss, etc.).
27. Initial or Boundary Conditions
● Initial condition involves knowing the state of pressure and
initial velocity at all points in the flow.
● Boundary conditions such as walls, inlets and largely
specified what the solution will be.
28. Discretization
● Domain is discretized into a finite set of control volumes or cells. The
discretized domain is called the “grid” or the “mesh”.
● General conservation (transport) equations for mass, momentum, energy,
etc., are discretized into algebraic equations.
● All equations are solved to provide flow field.
31. Finite Volume Method
● The finite volume method is a common approach used in CFD codes, as it
has an advantage in memory usage and solution speed, especially for large
problems,high reynolds number turbulent flows, and source term dominated
flows (like combustion).
● In this method the governing partial differential equations are recast in the
conservative form and then solved over a discrete control volumes and thus
guarantees the conservation of fluxes through a particular control volume.
● Here Q is the vector of conserved variables, F is the vector of fluxes V is the
volume of the control volume element, and A is the surface area of the control
volume element. The finite volume equation yields governing equations in the
form:
32. Finite element method
● The finite element method (FEM) is used in structural
analysis of solids, but is also applicable to fluids.
● It is much more stable than the finite volume approach.
However, it can require more memory and has slower
solution than the FVM.
● It subdivides a large system into smaller, simpler parts
that are called finite elements. The simple equations that
model these finite elements are then assembled into a
larger system of equations that models the entire problem.
33. Finite difference method
● The finite difference method (FDM) has historical
importance and is simple to program.
● The reduction of the differential equation to a system of
algebraic equations makes the problem of finding the
solution to a given ODE ideally suited to modern computers,
hence the widespread use of FDMs in modern numerical
analysis
● It is currently only used in few specialized codes, which
handle complex geometry with high accuracy and efficiency
by using embedded boundaries or overlapping grids.
34. Numerical Model Setup
For a given problem, you will need to:
-Select appropriate physical models.
-Define material properties.
1)Fluid
2)Solid
3)Mixture
-Prescribe operating conditions.
-Prescribe boundary conditions at all boundary zones.
-Set up solver controls.
-Set up convergence monitors.
35. Calculation of Coefficient of Drag over the Dinosaur
We calculate the theoretical values for the various parameters
required for calculation of the coefficient of drag on the
dinosaur:
Drag force: 17.4 N
Lift force: 5.5 N
Wind velocity: 5m/s
The dinosaur is 3.2 m tall.
It has a projected frontal area of A = 2.91m2
Air density: 1.225 kg/m3
36. The drag coefficient is:
Cd
= F/(0.5*ρv2
A) = 17.4/(0.5*1.225*25*2.91)
= 0.11
This is pretty good compared to the average car. The
streamlined back of the dinosaur resulted in a flow pattern
with very little separation.
Some drag coefficients :
1)Ferrari-> 0.36
2)Typical truck-> 0.6
3)Honda Odyssey-> 0.39
39. Limitations
● The CFD solutions can only be as accurate as the physical models on which
they are based.
● Solving equations on a computer invariably introduces numerical errors.
-Round-off error: due to finite word size available on the computer. Round-off
errors will always exist (though they can be small in most cases).
-Truncation error: due to approximations in the numerical models. Truncation
errors will go to zero as the grid is refined. Mesh refinement is one way to
deal with truncation error.
● Boundary conditions.
-As with physical models, the accuracy of the CFD solution is only as good as
the initial/boundary conditions provided to the numerical model.