Week 3 - Solving second order ODEs

AIM; Obtain the transfer function of a mass spring damper system and use it in the model. Add a PID controller to adjust the force on mass so that its position follows a reference signal. given data; Take m = 3.6; %kg k = 400; %N/m c = 100; %Ns/m solution;   transfer function of a mass spring…

Aim:Assemble and apply GD&T to the butterfly valve assembly drawing Objective: To design of Butterfly Valve in appropriate dimension with the application of GD&T - ASME Y14.5 2009. To assemble all the individual parts of the butterfly valve by assigning suitable constraints. To understand the concept of geometric…

AIM - Write a script that does data analysis.   Objectives - To ensure 1. Data visualizer 2. Compatability check 3. Basic performance calculation   Theory This code takes takes the data from a user specified CONVERGE format file. It also checks the file for the correct format i.e. compatibility. If the file is…

1. What does popt and pcov mean?   -An array of optimal values for the parameters which minimizes the sum of squares of residual. pcov – 2D array which contains the estimated covariance of popt. The diagonals provide the variance of the parameter estimate. 2.What does np.array(temperature) do?-Converts…

AIM: Write a program in Python that will simulate the pendulum motion, just like the one shown in the start of this challenge. use, L=1 metre, m=1 kg, b=0.05. g=9.81 m/s2. Simulate the motion between 0-20 sec, for angular displacement=0,angular velocity=3 rad/sec at time t=0. When you do this you will get the position…

AIM: Based on the concepts you have learnt during the forward kinematics routine, go ahead and write code that can solve an otto cycle and make plots for it. Here are the requirements 1. Your code should create a PV diagram 2. You should output the thermal efficiency of the engine.   ANSWER: An Otto cycle is…

Aim: The Main objective of this project was to setup no-hydrodynamics solver transient simulation of a port fuel injection engine using converge CFD. Introduction Port injection, the fuel injectors are positioned on the air intake leading to each cylinder of your engine. As your engine sucks in air to later be compressed…

Emission characterization on a CAT3410 engine Aim:- To run a 3D simulation of a CAT3410 diesel engine using two different piston bowl profiles and to understand the effect of piston bowl geometry on the performance and emission characteristics of the engine. GEOMETRY:- A tool called Make engine sector surface is used to…

Questions based on PFI Engine: Q1. What is the Compression ratio for the engine? The compression ratio is defined as the ratio between the volume of the cylinder with the piston in the bottom position, Vbottom (largest volume), and in the top position, Vtop (smallest volume). The higher this ratio, the greater…

Objective: Setup a transient shock tube simulation Plot the pressure and temperature history in the entire domain - Explain the result Plot the cell count as a function of time - Explain the result It is expected to show the mesh generation using PARAVIEW.  Answer: Received Geometry Boundary creation Geometry size…

In this project, a single-cylinder Port-fuel-injection (PFI) engine is setup for no-hydro simulation. Prior to it, surface preparation and boundary flagging are performed to make the geometry free from errors and to allocate the boundaries and regions. No-hydro simulation is performed to check the mesh generation and correctness…

Aim: Apply Reynold’s decomposition to the NS equations and come up with the expression for Reynold’s stress.Explain your understanding of the terms Reynold’s stressWhat is turbulent viscosity? How is it different from molecular viscosity? Turbulence: Turbulence is an irregular motion of the air resulting…

Aim: Baseline configuration Setup a flow simulation through a pipeInlet Reynolds number should be 7,000HINT : Use the below formula to calculate velocity for corresponding value of REYNOLD NUMBER and give DIRICHLET BC for velocity at inlet and specify the value for velocity calculated at INLET BC using below formula ,…

Aim:1. Shock flow boundary conditionsDo a literature search on what BC's are typically used for shock flow problems2. What is a shock wave?In your own words, describe the physics behind shock waves3. Effect of SGS parameter on shock location (Sub-Grid Scaling).In the Prandtl Meyer shock problem, look at the effect of SGS…

AIM - Transient simulation of flow over a throttle body. OBJECTIVE - Setup and run transient state simulation for flow over a throttle body. Post process the results and show pressure and velocity contours. Show the mesh (i.e surface with edges) Show the plots for pressure, velocity, mass flow rate and total cell count.…

Aim: Set up and run the steady state simulation for flow over throttle body. Post process the results and show pressure and velocity contours. Show the mesh (i.e surface with edges) Show the plots for pressure, velocity, mass flow rate and total cell count. Introduction: The throttle body is an important part of the air…

Aim: To setup the case in CONVERGE studdio. Objective: Once you have watched the video, setup the case in CONVERGE Once you have the base setup ready, run the case for three different base mesh sizes dx = dy = dz =2e-3m dx = dy = dz =1.5e-3m dx = dy = dz =1.0e-3m (If this is too much for your PC, use 1.2e-3m) Post process…

Aim: To Setup a channel flow Cases. Objective: 1. For this challenge, we will be setting up a channel flow tutorial. 2. As you watch these videos, set up the case in CONVERGE 3. Make sure the inlet pressure and initial pressure are the same. 4. Once you have the base setup ready, run the case for three different base mesh…

Objective: Perform Combustion Simulation on the Combustor model using Ansys Fluent, plot the variation of the mass fraction of the different species and write a detailed report explaining the results obtained. Question: Part I Perform a combustion simulation on the combustor model and plot the variation of the mass fraction…

Challenge: 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…

CFD Meshing for Tesla Cyber Truck   Aim:For the given model of tesla's Cyber truck, check and solve all geometrical errors and Assign appropriate PIDs. Perform meshing with the suitable Target length and element Quality criteria and also create a wind tunnel and perform volumetric mesh. Objective: Target lengths for the…

Aim:- To perform analysis on cyclone separator and calculate the separation efficiency and pressure drop. Objective:- To write a few words about any four empirical models used to calculate the cyclone separator efficiency. To perform an analysis on a given cyclone separator model by varying the particle diameter from 1…

CFD Meshing for Tesla Cyber Truck   Aim:For the given model of tesla's Cyber truck, check and solve all geometrical errors and Assign appropriate PIDs. Perform meshing with the suitable Target length and element Quality criteria and also create a wind tunnel and perform volumetric mesh. Objective: Target lengths for…

CFD Meshing for Tesla Cyber Truck   Aim:For the given model of tesla's Cyber truck, check and solve all geometrical errors and Assign appropriate PIDs. Perform meshing with the suitable Target length and element Quality criteria and also create a wind tunnel and perform volumetric mesh. Objective: Target lengths for…

Aim: For the given models, check for the geometrical errors and delete surfaces which are unwanted for Surface wrap as shown in the videos. After clearing geometry, Merge all 3 models and perform surface wrap. Objective: Target length for Wrap = 3 mmWrite a detailed report on steps followed to finish this challenge. Geometry:…

Abstract: Graphics card are used for enhancing the computational performance and improve processing speed. It is important to keep the processor at an optimum temperature. So, in this study a conjugate heat transfer analysis is performed. Different material is assigned at different solid zones. For turbulent modelling…

AIM: To mention some practical CFD models that have been based on the mathematical analysis of Rayleigh Taylor waves and explain how these mathematical models have been adapted for CFD calculations. To perform the Rayleigh Taylor instability simulation for 2 different mesh sizes with the base mesh being 0.5 mm and compare…

Aim:                  For the given model,check and solve all geometrical errors on half portion and assign appropriate PIDs.Perform meshing with the given Target length and element Quality criteria.After meshing the half model,Do symmetry to the other side. Objective:  …

Aim: Steady-state CHT analysis on Exhaust port at an inlet velocity of5m/sec Objective: The objectives will mainly focus on 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…

Aim:For the given of a turbocharger,check for the geometrical errors to make appropriate volumes. create and assign PIDs accordingly.Create surface mesh and use that to create a volumetric mesh. Objective: 1) Perform surface mesh with the given target lengths as per PIDs. a.Blade stage-1 = 1 mm b. Blade stage-2 = 1mm c.…

Objective: The objective of this project is to create a surface meshing on a pressure valve with element type of tria and mesh the model with three different target length i.e.,1mm,3mm and 5mm, by using ansa. Introduction: ANSA: Ansa is a computer-aided engineering tool for finite Element analysis and cfd analysis…

1. Describe Ahmed's body and its importance. The Ahmed body is a simplified car body used in the automotive field to study the impact of the flow pattern on the drag. The external aerodynamics of the car defines many major traits of an automobile like stability, comfort, and fuel consumption at high speeds. The flow around…

Solutions: The flow over a 2D cylinder is a very simple flow simulation and has a lot of fluid properties to be monitored while running it. While the flow can be witnessed in real life, It has a specific pattern that forms the Karman Vortex Street. its an oscillation flow phenomenon that can be observed very easily. So…

OBJECTIVE: For this challenge, we have created two versions of the mixing tee. One of them is longer than the other. Our job is to set up steady-state simulations to compare the mixing effectiveness when hot inlet temperature is 360C & the Cold inlet is at 190C. Use the k-epsilon and k-omega SST model for the first…

Aim: Simulation of a 1D Super-sonic nozzle flow simulation using Macormack Method. In this challenge you are going to simulate the isentropic flow through a quasi 1D subsonic-supersonic nozzle. You will derive both the conservation and non-conservation forms of the governing equations and sovle them using the MacCormack's…

AIM In this challenge you will simulate the same problem as in week 11 but by applying Symmetry Boundary Condition. You will do the simulation for the below mentioned angles using both symmetry and wedge boundary conditions and validate them with HP equations like you did in week 11 challenge.   Angles to test: 10,25,45(degrees)…

In this challenge,we will simulate an axi-symmetric flow by applying the wedge boundary condition. The flow is laminar and flows through a constant cross-section pipe at an inlet Reynold's number of 2100. we can do a transient or steady state simulation and you will validate your results with the Hagen- Poiseuille's equations…

Description:   There are total 4 Numerical Methods: Finite Element Method (FEM) Boundary Element Method (BEM) Finite Volume Method (FVM) Finite Difference Method (FDM) Efficient technology for CFD with the finite-difference and finite-volume method has become increasingly popular and have been using from much longer…

Simulation start procedure after opening openfoam terminal >>cd tut>>Is>>cd incompressible>>Is >>cd ico Foam >>Is>>cp-r cavity/$FOAM_RUN/channel_test>>cd$FOAM_RUN >>cd chaneel_test>>cd system>>getit blockMesh   blockMeshdict - This dict contains information…

Objective:   1. Steady-state analysis & Transient State Analysis Solve the 2D heat conduction equation by using the point iterative techniques that were taught in the class. The Boundary conditions for the problem are as follows; Top Boundary = 600 K Bottom Boundary = 900 K Left Boundary = 400 K Right Boundary…

Aim:-The aim of this project,is to derive central difference,skewed right difference and skewed left difference scheme for fourth order approximation of second order derivative by using, Taylor table of finite difference method. 1.Central difference:-To derive central difference for fourth order approximation of second…

WORKING PRINCIPLE OF A WASHING MACHINE: A washing machine by spinning at 800 1600 rpm helps soap and dirt with it to leave the surface of the cloth via centrifugal force and into outlet pipes hence utilizing centrifugation to both clean and partially dry the clothes loaded in it. Thus the processes are electrically controlled,…

  Aim: To prepare a technical report of Simulation of BAJA All-Terrain Vehicle (ATV) under different conditions. Objectives: Carry out a system-level simulation of an all-terrain vehicle and prepare a technical report explaining the model properties & comments on the results. ALL TERRAIN VEHICLE: An all-terrain…

1. Here first we are going to study the Simulink model of the doorbell using a solenoid block. We need to access the Simulink with the block parameters to run the simulation. First, we need to get to understand the theory behind the Doorbell mechanism. Theory of Doorbell: A chime doorbell uses a specialized sort of electromagnet…

clear all close all clc fprintf(' SIMULATOR OF RANKINE CYCLE nn') fprintf('1-2 Isentropic Expansion in the Turbinen') fprint('2-3 Constant pressure Heat Rejection by the Condensren') fprint('3-2 Isentropic Compression in the pumpn') fprint('4-1 Constant Pressure Heat Addition by the Boilernn') %inputs P1 = input('Enter…

clc close all clear all %getting data file f = fopen('THERMO.dat','r'); fgetl(f); %reading header informations tline = fgetl(f); A = str2num(tline); global_low_temp = A(:,1); global_low_temp = A(:,2); global_high_temp = A(:,3); %skipping comment lines for i = 1:3 fgetl(f) end %reading species data for i = 1:53 linel =…

clear all close all clc % p=100; % Population size c=30; % number of pairs of chromosomes to be crossovered m=30; % number chromosomes to be mutated tg=250; % Total number of generations % figure title('Blue - Average Red - Maximum'); xlabel('Generation') ylabel('Objective Funtion Value') hold on P=population(p); k = 0;…

%% clear all; close all; clc %% L=1; t=linspace(0,20,150); x0=[0 3]; %this below step is for solving differential equation using ode45 (matlab in built funtion) [t x] = ode45('pendulum_2nd_order',t,x0); %% %plotting for tracing of angular velocity and angular displacement subplot(2,1,1) plot(t,x(:,1),'-b','linewidth',3);…

% simulate forward kinematics of a 2R robotic arm clear all close all clc %input l1 = 1; l2 = 0.5; theta1=linspace(0,90,10); theta2=linspace(0,90,10); %loop ct=1; for i = 1;length(theta1) THETA1=theta1(i); for j=1:length(theta2) THETA2=theta2(j) x0=0; y0=0; x1=l1*cosd(THETA1); y1=l1*sind(THETA1); x2=x1+l2*cosd(THETA2);…