Fluid mechanics is a science in study the fluid of liquids and gases in the cases of silence and movement and the forces acting on them can be divided materials found in nature into two branches.
Determination Of Geometric Stress Intensity Factor For A Photoelastic Compac...Anupam Dhyani
Experimental and analytical studies with finite elements was done on a polycarbonate transparent material as a forerunner to a similar study on transparent glass -epoxy composites
Fluid mechanics is a science in study the fluid of liquids and gases in the cases of silence and movement and the forces acting on them can be divided materials found in nature into two branches.
Determination Of Geometric Stress Intensity Factor For A Photoelastic Compac...Anupam Dhyani
Experimental and analytical studies with finite elements was done on a polycarbonate transparent material as a forerunner to a similar study on transparent glass -epoxy composites
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
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/
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.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
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.
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.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
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What is G force?
• G-force stands for either the force of gravity on a particular extra terrestrial body or the
force of acceleration anywhere.
• It is measured in g's, where 1 g is equal to the force of gravity at the Earth's surface,
which is 9.8 meters per second per second.
• Moving on with the explanation of G force, the g-force on an object is its acceleration
relative to free-fall. The object experiences this acceleration due to the vector sum of
non-gravitational forces acting per unit of the object's mass. These accelerations, also
known as "proper accelerations,” are not the result of gravity itself.
• Because of the stresses and strains on objects, sufficiently large g-forces may result which
can be highly destructive to objects and organisms.
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• Today the analysis and study of g-forces is significant in a variety of scientific and
engineering fields, such as planetary science, rocket science and astrophysics.
• It is equally important in the engineering fields of various machines such as race cars,
fighter jets, and large engines.
• G-force can vary on different planets or celestial bodies.
• A body having a bigger mass will produce a higher gravitational field, thus resulting in
higher g-forces.
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Examples of G force
• For example, the g-force on the Moon is about 1/6 g, and on Mars it is about
1/3 g. Humans are able to bear localized g-forces in the 100s of g's for a split
second, such as a slap on the face.
• But continued g-forces above about 10 g can lead to permanent injury and are
deadly.
• It has been seen that there is significant disparity among individuals on the
tolerance to g-force.
• For example, Race car drivers have survived instant accelerations of up to 214 g
during accidents. Some rocket sled experiments are designed to examine the
effects of high acceleration on the human body. In 1954 Colonel John Stapp
experienced 46.2 g for several seconds.
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Unit of “G”
• International System of Units (SI) for the g-force, which is m/s2.
• However, for easy comparison the unit g is also often used, which stands for the
acceleration due to gravity at the Earth's surface.
• It is written g, or G.
• Generally, accelerations beyond 100 g are lethal even if momentary.
• It would be technically incorrect to look at the term g-force as force, as it is not
force but a measure of acceleration
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Acceleration and G force
• It is interesting to note here that while acceleration is a vector quantity, g-forces
are often expressed as a scalar.
• G-force can also be expressed as vector acceleration, with the positive g-forces
working towards the bottom of a vehicle and negative forces towards the top.
• G forces, when multiplied by a mass upon which they are acting, are related to a
certain type of mechanical force.
• It is this force which creates compressive stress and tensile stress.
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Example of application of G force
• For example, in the case of is vertically upward G-force, applied by the ground or
the floor of an elevator to a standing person, most of the body will feel
compressive stress.
• This stress at any height, if multiplied by the area, is the related mechanical force,
which is the product of the g force and the supported mass.
• At the same time, the arms will experience a tensile stress, which at any height, if
multiplied by the area, is again the related mechanical force, which is the product
of the g-force and the mass suspended below the point of mechanical support. It is
seen that for a given g-force the stresses are the same, in spite of of whether this g
force is a result of gravity, acceleration, or a combination. Hence, for people it will
feel exactly the same
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Vertical Axis G force
• The tolerance of G forces by human body depends on the magnitude of the g-force,
the length of time for which it is applied, its direction and location of application
and as well as the posture of the body
• The human body, as we know is flexible and supple. To some extent, g-tolerance
can be trainable, but some illnesses, particularly relating to cardiovascular
problems, reduce the g-tolerance.
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Horizontal Axis G force
• It has been seen that the human body is much better at surviving g forces that are vertical
to the spine. So, when the acceleration is forward, the g-force pushes the body backwards,
which is known as "eyeballs in".
• When the acceleration is backwards, the g-force pushes the body forwards, which is
known as "eyeballs out".
• The human body shows much higher tolerance when the acceleration is backwards. The
blood vessels in the retina show as being more sensitive in the latter direction.
• The endurance of g-force is also known to depend on time period and the rate of change in
acceleration.
• This is known as jerks and is expressed as m/s3 in SI units.
• In non-SI units, jerk can be stated simply as gees per second (g/s).
• There are no jerks without push. Very short durations or high jerk forces of 100g have been
claimed.
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Measuring of G force
• An accelerometer is the main tool used for measuring G Force
• An accelerometer is a damped mass on the end of a spring in its simplest form.
• It is capable of measuring the distance the mass has moved on the spring along the axis
or in a particular direction. Accelerometers are often standardized to measure g-force
along one or more axes
• For example, a stationary, single-axis accelerometer is adjusted so that its measuring axis
is horizontal.
• Therefore, its output will show G Force measurement to be 0 g, and will continue to be 0
g if it is placed in a vehicle moving at a constant velocity on a level road.
• But if the automobile driver brakes sharply, the accelerometer will give a reading of
about −0.9 g, which corresponds to a deceleration. However, the jerk due to a change in
motion in the vehicle and gravity pull of the ground on the accelerometer should not be
looked at as the same thing
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• But if the accelerometer is turned around by 90°, so that its axis points upwards, it will
calculate G Force to be +1 g upwards even though the vehicle is still stationary.
• Here, the accelerometer is exposed to two forces: the gravitational force and the ground
reaction force of the surface it is placed on.
• Remember that the accelerometer can measure only the latter force, due to mechanical
interaction between the accelerometer and the ground.
• During a free fall in an airplane the accelerometer does not calculate the earth’s force of
gravity. The reading given by the device is the acceleration it would have if it were solely
subject to that force. The accelerometers are designed to measure only the mechanical
components of accelerations, and thus calculate G Force directly
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• The three-axis accelerometer, for calculating G Force.
• It will give the output zero-g on all three axes if it is dropped. Otherwise it is put into a
ballistic trajectory, which is also known as an inertial trajectory, so that it experiences
"free fall”.
• This is what the astronauts experience while in orbit. Some popular amusement park
rides offer several seconds at near-zero g force. “Vomit Comet” of NASA also offers near-
zero g for about 25 seconds at a time.
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• Measuring G Force in a single-axis accelerometer adjusted in an airplane so that its
measurement axis is vertical, will give a reading of +1 g when the plane is stationery.
• This is the "g-force" applied by the ground. But when the airplane is flying at a constant
altitude, the accelerometer will continue to give the G Force measurement of 1 g. Now,
the g-force is provided by the aerodynamic lift, acting in place of the ground to prevent
the plane from free-falling.
• Under these conditions, the upward force which acts upon the pilot’s body is the normal
value of about 9.8 newton's per kilogram (N/kg). This is provided by his seat, which is
supported by the lift of the wings. If the pilot pulls back on the stick so that the
accelerometer gives a reading of 2 g, the g force calculation acting upwards on him will
become double to 19.6 N/kg.
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Examples of G forces
Some Typical Examples Of G Forces
• In order to understand G forces better, it is a good idea to see them
• manifesting in practical life situations as G Forces examples.
Given below are some typical examples of G Force:
• Standing on the Earth at sea level, where g force = 1 g
• A ride in the Vomit Comet , with g force = 0 g
• Standing at its equator on the Moon, with g force = 0.1654 g
• The gyro rotors in Gravity Probe B and the free-floating proof masses in the TRIAD I
navigation satellite, with g force equal to 0 g
• Saturn V moon rocket just after launch , g force = 1.14 g
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• Space Shuttle, maximum during launch and reentry, g force =3 g
• Luge, maximum expected at the Whistler Sliding Center, g force equal to 5.2 g
• Formula One car, maximum under heavy braking, g forces = 5 g
• Apollo 16 on reentry, g forces = 7.19 g
• Standard, full aerobatics certified glider , g forces = +7/-5 g
• Death or serious injury likely, g force can be greater than 50 g
• Max. turn in an aerobatic plane or fighter jet, g forces ranging from 9–12 g
• Maximum g force for human on a rocket sled = 46.2 g
• Sprint missile, g forces = 100 g
• Brief human exposure survived in crash has g forces > 100 g
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• Bugatti Veyron from 0 to 100 km/h in 2.4 s, has g force = 1.18 g
• High-g roller coasters have g forces ranging from 3.5–6.3 g
• Top Fuel drag racing world record of 4.4 s over 1/4 mile, g force = 4.2 g
• Shock capability of mechanical wrist watches g forces > 5,000 g
• Rating of electronics built into military artillery shells, g forces equal to15,500 g
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Application of G in analysis
• Note: The information in this section applies to all linear, nonlinear, and fluid flow
analyses that support gravity/acceleration loads.
• A gravity or acceleration load applies an acceleration value to any part that has a mass
density defined. The acceleration can be applied along any direction.
• In the case of Linear analyses : Static Stress, Modal with Load Stiffening, and Critical
Buckling and Flow through Porous Media analysis, the acceleration value is constant.
• For Nonlinear analyses : Static Stress with Nonlinear Materials and Fluid Flow analyses,
Steady, Unsteady, and Open Channel Flow, the acceleration is controlled by a load curve
and can be increased gradually and/or otherwise varied over time
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Standard Earth Gravity in ANSYS
• This boundary condition simulates gravitational effects on a body in the form of an
external force.
• Gravity is a specific example of acceleration with an opposite sign convention and a fixed
magnitude.
• Gravity loads cause a body to move in the direction of gravity.
• Acceleration loads cause a body to move in the direction opposite of the acceleration.
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Analysis Types
Standard Earth Gravity is available for the following analysis types:
- Explicit Dynamics
- Rigid Dynamics
- Static Structural
- Transient Structural
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Applying G or Acceleration
- To apply a gravity or acceleration load to a model, right-click the Gravity/Acceleration
heading under the Analysis Type heading in the tree view and select the Edit command.
- Note that the text of this command will be gray before gravity is activated and defined.
- However, it is not grayed-out. That is, the heading is still right-clickable and
the Edit command is available. The heading text becomes black once gravity is set up.
Note: You can also click the Gravity command within the Loads or Fluid Flow Loadspanels
of the ribbon Setup tab. Either method displays the Gravity/Acceleration tab of the
Analysis Parameters dialog box.
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- To apply the acceleration due to gravity on Earth, press the Set for standard gravity
button. The standard value for the acceleration of gravity is applied in the units of the
model.
- To apply a different acceleration magnitude, specify this in the Acceleration due to body
force field. Next, use the X multiplier, Y multiplier, and Z multiplier fields to define the
vector along which the acceleration is applied.
- Specifying a value in only one of these fields applies the acceleration in that direction.
Specifying values in more than one of these fields applies the acceleration along an
arbitrary vector.
- The value in the Acceleration due to body force field is multiplied by the values in these
three fields before it is applied to the model in that direction