Week 4

LS-Dyna Consistency of Units Aim: Value of the following measurements are given as follows: MASS 1kg LENGTH 1m TIME 1s FORCE 1N STRESS 1Pa ENERGY 1Nm DENSITY 1Kg/m3 YOUNG'S Modulus 210GPa Velocity 56.33KMPH GRAVITY 9.8m/s2 Now, here are a few systems of units: Kg cm ms Kg cm s gm mm ms kg m s g cm s g cm us g mm s ton…

Simulating Combustion of Natural Gas Aim: Part I Perform a combustion simulation on the combustor model and plot the variation of the mass fraction of the different species in the simulation using line probes at different locations of the combustor as shown in Fig. You need to plot for CO2, H2O, CH4, N2, O2, NOx emissions…

Parametric Study on Gate Valve Aim: For this challenge, you will have to perform a parametric study on the gate valve simulation by setting the opening from 10 % to 80%. Obtain the mass flow rates at the outlet for each design point. Calculate the flow coefficient and flow factor for each opening and plot the graph. Discuss…

Cyclone Separator Simulation Aim: To perform analysis on cyclone separator and calculate the separation efficiency and pressure drop.  Write a few words about any four empirical models used to calculate the cyclone separator efficiency. Case 1: Perform an analysis on a given cyclone separator model by varying the…

CHT Analysis on a Graphic Card Task: Perform a steady-state conjugate heat transfer analysis on a model of a graphics card. You can use appropriate materials of your choice for the simulation. Make sure to properly define the correct solid and fluid zones. Refer the video for further clarification and the model is provided…

Rayleigh-Taylor Instability Task: What are some practical CFD models that have been based on the mathematical analysis of Rayleigh Taylor waves? In your own words, explain how these mathematical models have been adapted for CFD calculations. Perform the Rayleigh Taylor instability simulation for 2 different mesh sizes…

Exhaust Port Simulation (CHT - Conjugate Heat Transfer) Objectives: Give a brief description of why and where a CHT analysis is used. Maintain the y+ value according to the turbulence model and justify the results.  Calculate the wall/surface heat transfer coefficient on the internal solid surface & show the velocity…

External flow simulation over an Ahmed body Task: For this challenge, you will have to provide answers to the following questions: Q1. Describe Ahmed's body and its importance. Q2. Explain the reason for the negative pressure in the wake region.  Q3. Explain the significance of the point of separation.  Expected…

Flow Over a Cylinder Question: Simulate the flow over a cylinder and explain the phenomenon of Karman vortex street.   PART-I Simulate the flow with the steady and unsteady case and calculate the Strouhal Number for Re= 100. PART-II Calculate the coefficient of drag and lift over a cylinder by setting the Reynolds…

Question: There are two versions of the mixing tee. One of them is longer than the other. The aim is to set up steady-state simulations to compare the mixing effectiveness when hot inlet temperature is 360˚C & the Cold inlet is at 190˚C.  Use the k-epsilon and k-omega SST model for the first case and based on…

Aim: To wrie a code that des the fllowing - Data visualizer The script should take column numbers as the input and plot the respective columns as separate images. Each file should be saved by the name of the column The plot labels should be extracted from the file and must appear as labels in the plots. Compatability…

Aim: To write code to fit a linear and cubic polynomial for the Cp data and explain if the results are favorable or not. Theory: Curve Fitting is the process of constructing a curve through mathematical function that best fits to a series of data points, possible subject to constraints. Curve fit function returns two items,…

Aim: To write a program that solves the following ODE. This ODE represents the equation of motion of a simple pendulum with damping Where, g = gravity in m/s2, L = length of the pendulum in m, m = mass of the ball in kg, b=damping coefficient.     Simulate the motion between 0-20 sec, for angular displacement=0,angular…

Aim: To write code that can solve an otto cycle and make plots for it. 1. The code should create a PV diagram 2. Output the thermal efficiency of the engine.   Theory: An Otto cycle (also called Constant Volume Process) is an idealized thermodynamic cycle that describes the functioning of a typical spark…

Wire Bending Challenge Report Aim: You will have to perform an analysis to simulate the bending of a wire in ANSYS. You will have to use Copper Alloy (Non-Linear), Aluminium Alloy (Non-Linear) and Magnesium Alloy (Non-Linear) for the wire alone. You need to find out the Equivalent stress and Equivalent strain on the wire…

Machining with a Planer Report   Aim: You will have to perform an explicit dynamics simulation to find out the Equivalent Stress, Total Deformation and insert a User defined result to calculate the temperature of the body. You need to perform this for 2 cases. One will be with a cutting velocity of 20000mm/s and the other…

Bullet through Bucket Report   Aim: For this challenge, you will have to simulate a bullet penetrating into a bucket. You will need to use 3 different non-linear materials for the bucket and analyse their behaviour for the same velocity of bullet. Apply the conditions for bullet as mentioned in the video itself. Attach…

Car Crash Simulation Report   Aim: For this challenge, you will have to perform a parametric study using 3 different values of thickness for the car body. You need to apply the same conditions as mentioned in the video that corresponds to this challenge. Analyse the total deformation and Equivalent stresses acting on the…

Worm Gear Simulation Report   Aim: For this challenge, you will have to perform a transient structural analysis on a worm gear assembly. For the academic version, you need to cut the gear by half to bring the model within limits. For the challenge, you must rotate the worm to get to almost end of the half cut and…

Universal Joint Report   Aim: For this challenge, you will have to perform a transient structural analysis on a double universal joint with a spring using three different materials: Structural Steel, Stainless Steel and Titanium alloy(They can all be found in the General Materials section) The three materials must be used…

Tension and Torsion Test Report   Aim: For this challenge, you will have to perform the tension and torsion test on the specimen provided below the video corresponding to the challenge.  For the tension test, displace one end of the specimen to 18mm while keeping the other fixed. You will need to find out the total deformation,…

Long Piston with Cam Report Aim: For this challenge, you will have to perform a transient analysis on a piston and cam mechanism model that has been provided to you. You need to run the analysis with Frictionless contact, Frictional with 0.1 and 0.2 as the frictional contact for a total of 3 cases.   Find out the…

iPhone bending Report Aim: For this challenge, simulate the bending of iPhone as per the given cases below: Case 1: Simulate the model as it is given in the video Case 2: Move the bottom fingers from their defined position to the given position X= 22.5mm & Z= 10mm and obtain the results for the simulation.…

Sphere bending Plate Report Aim: For this challenge, perform the analysis to simulate a sphere pressing on a plate. Use Structural steel for both sphere and plate but the material of the plate must be Non-Linear. Press the sphere onto plate 4mm downwards and retract it. The plastic deformation must be captured by you.…

Rolling Operation Report Aim: Simulate the rolling operation on a workpiece made of copper. Increase the length of the workpiece by 60mm and decrease its size on both sides by 8mm. Run the simulation for 14 steps and you can give small but random values for the displacement. Ensure that the edge of the workpiece is displaced…

 Verification of Welded Joints Challenge Report Aim: Simulate three different types of welding using three different weld materials Weld Material used: Case 1.  Stainless Steel: In this case, the material of the plates must also be the same. Use Stainless steel for both weldments and plates. No need to add flux…

Sheetmetal Bending Challenge Report   Aim: Sheet metal bending is to be performed for 3 different materials mentioned below. Variation of certain settings is also to be performed and your conclusions are to be added to the report Run the analysis for the material: Case 1: Aluminium Alloy 1199(mentioned in the course…

Week 2 Challenge – Rail wheel Challenge Report Aim: Perform a static structural analysis on the Railwheel and Track setup and Case 1: Multiply the bearing load by 5 times and compare the results with the load of 100000 N (As done in week 2 video). Compare the Total Deformation, Equivalent stress and the life under…

Bevel Gear Report Aim: 1)Write a few words on what a grid dependency test is and its use. 2)Perform a grid dependency test for the Bevel gear simulation for mesh sizes of 6,5 and 4 mm 3) Solve for Von-Mises stress, Equivalent elastic strain and Total Deformation using the previously mentioned mesh sizes. 4) Present your…

Spur Gear Report   Objective: Write a detailed report comparing the results of the three cases and conclude which material would you recommend based on these results. Procedure: Select Static Structural, drag and drop into Project Schematic. Choose material as per the case, under Engineering Data. Under geometry tab,…

Stress Concentration on a Plate with hole   Aim: To design a plate with hole(s) and determine the best case out of the two. Procedure:   Case 1: Plate with 1 Hole Select Static Structural, drag and drop into Project Schematic. Choose material under Engineering Data. Structural Steel. Under geometry, double-click…

Objective: For the given assembly, check for the geometrical errors and mesh with the given element Quality criteria. After meshing the component, the thickness must be assigned for mid surfaces. Use tetra elements to model non-uniform thickness components. Also use connections to connect the component as suggested in…

Objective: For the given component, check for the geometrical errors and mesh with the given element Quality criteria. After meshing the component, the thickness must be assigned. Write a detailed report on your meshing process and mention which method you used to extract the mid-surface along with the reason. Procedure:…

Objective: In this challenge, practice all the Morphing techniques that were shown in the video for the given component. Write a report on Morphing and its use cases in various industries. Procedure: The given component is to be morphed as explained in the video: Firstly, TOPO command is to be used to convert all single…

Objective: For the given rear door FE model, apply the technique and the elements to implement the connections. Write a detailed report on why you chose a certain type of element for connecting certain parts of the door. Procedure: The given rear door model needed connections to be added. Door Hinge area & Latch Cover…

Objective: For the given component, check for the geometrical errors and mesh with the given element Quality criteria. Use tetra elements to model the component and there should not and kinks and dips on the surface of the component. Procedure: The given component was an Intake Manifold: Topo command was used to convert…

Objective: For the given component, check for the geometrical errors and mesh with the given element Quality criteria. Use tetra elements to model the component and there should not and kinks and dips on the surface of the component. Procedure: The given component was a rear-view mirror. It was divided into 4 PIDs (PSHELL):…

Objective: For the given Component and Switch Panel, check for the geometrical errors and mesh with the given element Quality criteria. After meshing the component, the thickness must be assigned. Procedure: The given Component was 2mm thick: Component: A new PID was created for the mid-surface. To extract the midsurface,…

Objective: For the given Bottlecap, check for the geometrical errors and mesh with the given element Quality criteria. After meshing the component, the thickness must be assigned. Procedure: The given Bottle Cap was divided into two parts for simplification: Part 1 and Part 2 Part 1: The upper half of the bottle cap was…

Objective: For the given component, check for the geometrical errors and mesh with the given element Quality criteria. After meshing the component, the thickness must be assigned. Procedure: The HOOD model consisted of a total of 5 components: Outer Body Inner Body Latch Left hinge Right hinge Before starting the process,…

Objective: To check and create the properties for a neon side crash model.   Procedure: Kindly find the procedure in the ppt attached. The main file can be found under \"run2\".   Result: The neon crash model was successfully anaysed and the requested values were noted.

Objective: To check and create the properties for a neon frontal crash model.   Procedure: Kindly find the procedure in the ppt attached.   Result: The neon crash model was successfully anaysed and the requested values were noted.

OBJECTIVE: To add suitable connectors to the bumper mesh provided. To compare the various differences between type 7 and 11 contact interfaces with and without notches. The differences in Rigid wall forces, Internal Energy and Contact Energy is to be compared.   PROCEDURE: The bumper mesh file was firstly added with…

OBJECTIVE: To compare 7 cases as shown in the question, with each case having different material properties.   PROCEDURE: The procedure taken throughout this assignment is exactly as mentioned in the question. All 7 cases have been analysed and compared. [Kindly refer to the attached ppt file which consists of elaborate…

OBJECTIVE: Case 1: To run the base simulation without any modification to element properties. At the end of the simulation, to do the energy error and mass error checks and determine whether results would be acceptable. If found acceptable, to plot rigid wall forces, internal energy, hourglass energy, contact energy, total…

Answers: 1. E=210GPa, p=0.0078g/mm3     c= 5188745mm/s 2&3. l=1000mm, c=5188745mm/s     t=1.927e-4 s 5.  f= 1.927e-4 / 20= 9.635e-6s 7. Two parts were to be 3D meshed:    HOUSING - Cover and Hub - The model consisted only of surfaces. - 2D Tria mesh was made with element size of 5mm.…

OBJECTIVE: To carry out the geometry cleanup operation on the given 3 files. Practice  Clip Repair Mounting Bracket PROCEDURE: There were 3 main components that had to be meshed: Practice, Clip repair and Mounting Bracket. The procedure followed was the same for all the three parts. - Firstly, the parent surfaces…

OBJECTIVE: BatchMesh the 2 hm files according to details provided. PROCEDURE: Two components were given for batchmesh. 1) Fender: - Received the component as a solid. - Deleted the solid, left with surfaces. - Duplicated the component to save the parent surfaces, for future references. - Created another collector, named…

OBJECTIVE: Mesh and connect the attached parts of assembly according to details provided. PROCEDURE: Right_Rail_2 & Front_truss_1:- Seam-Quad(angled+capped+L) Meshed the surfaces to be welded. Element Size 6, Quads only. At the desired location, performed Seam-Quad(angled+capped+L) weld with weld angle 45, cap angle…

OBJECTIVE: 3D (Tetra) Mesh the attached files assembly according to quality parameters as provided. PROCEDURE: 3 Files were to be meshed: Housing Assembly: There were 2 components inside the assembly. Meshed them one at a time. First checked if the component is a solid. It was a solid. Then deleted the solid and was left…

Objective:To extract midsurface, mesh and assign thickness to the component acording to the given criteria. Procedure: Imported the solid model and deleted all solids, leaving behind surfaces.There were 5 components, extracted midsurface for each of the components.Then meshed each of the 5 midsurfaces, one at a time. First…

Hi Akil, I have completed Week 4 challenge and attached the file below for your review. Please find images of the same: Thanks, Prasanna.

Hi, Please find the Yacht Assembly model for the challenge in the link below for your review. You can find all models and images under the zip(Prasanna_Yacht_Assembly) in the same folder. Link: https://drive.google.com/open?id=1Kv4aPVnl-XATOwbCPYw7QNVdVd5qNiPM   Thanks, Prasanna.

Hi, Please find the Gas Tank model and Assembly model for Week 6 challenge in the link below for your review. You can find all models under the assembly (Prasanna_Assembly_Chopper) in the same folder. Link: https://drive.google.com/open?id=1Kv4aPVnl-XATOwbCPYw7QNVdVd5qNiPM   Thanks, Prasanna.

Hi, Please find the two models (Chassis and Engine) for Week 5 challenge in the link below for your review.  Link: https://drive.google.com/open?id=1Kv4aPVnl-XATOwbCPYw7QNVdVd5qNiPM   Thanks, Prasanna.

Hi,   Please find the two models (Rear Wheel and Front Fork) for Week 4 challenge in the link below for your review.  Link: https://drive.google.com/open?id=1Kv4aPVnl-XATOwbCPYw7QNVdVd5qNiPM   Thanks, Prasanna.

Hi, Please find the GDrive link below: https://drive.google.com/open?id=1Kv4aPVnl-XATOwbCPYw7QNVdVd5qNiPM You can find the models for the Week 2 Challenge here. - Oil Tank - Chain - Pedal Kindly let me know in case you are unable to access the link or find any issues with opening the part file.   Thanks, Prasanna.