Challenge 7

Introduction The aim of this challenge is to simulate the flow over an Ahmed body. Separation flow, the wake formation and the drag / lift coefficients need to be calculated. At the same time, a grid independency test needs to be performed. Automotive industry is interested in the aerodynamics of the vehicles because its…

Introduction The aim of this challenge is to simulate the flow over a cylinder in order to capture the Von Karman vortex street. A Karman vortex street consist of continuous pattern of rotating structures (vortices). This pattern is a periodically oscillating flow, known as vortex shedding, and takes place downstream of…

Mixing Efficiency Introduction, Theory and Aim A common issue in a pipeline system is the effectiveness of mixing streams, which have different temperatures. CFD simulations help the engineers to predict the heat transfer between the streams and evaluate the outlet velocity and temperature profiles. The theory behind this…

Challenge 11 Tutorial - single cyl DI add case 2 with discretization length 0.1 mm for intake runner and compare with default case 1 The following figures show the tutorial which need to be explored, the PipeRound template, in which the discretization length is defined as a parameter and the case setup where two cases…

Challenge 7 In this challenge FRM model is analysed. Explore tutorial number 9 The following figures show the detailed model of 4-cylinder Turbochargered Gasoline Direct Injection engine as well as the case setup and the results of the simulation. (09-FastRunningModel\\Step1.gtm). The time parameters for this model is…

Challenge 6 In this challenge, turbochargers are explored. List down different turbochargers and locate examples from GT Power There are 6 different types of turbocharger Waste-Gate Turbocharger (WGT) (Examples: Diesel_WGController.gtm) Variable Geometry Turbocharger (VGT) (Examples: Diesel_VGT_EGR.gtm) Twin Scroll Turbocharger…

Challenge 4 In this challenge, the tutorial 1cyIDI-final.gtm model is explored and compared to the corresponding tutorial of the SI engine. The model is shown below:   1.Compare SI vs CI and list down differences (assignment no 2-SI) SI CI Its operation is based on OTTO Cycle Its operation is based on DIESEL Cycle…

Challenge 2 In this challenge tutorial 1cyISI-fianl.gtm is explored. The next figure shows the SI engine model.   Q1. Run the case at 1800 rpm and list down important parameters The engine speed is set up at 1800 RPM as the following figure shows. After running the simulation, the subsequent results noted down: -Air…

Challenge 1 Q1: Explore the GUI of GT SUITE and list down modules available with brief description. When GUI of GT SUITE is enabled, GT-SUITE Template Library appears. This window contains all the necessary components, in order to set up a simulation, distributed at 8 different categories: Flow: Components like pipes,…

See the attached PDF

See the attached PDF

See the attached.

Reynold's Decomposition Conservation of Mass `(delrho)/(delt) + del/(delx_i) (rhou_i) = 0`  

https://projects.skill-lync.com/projects/Shock-tube-simulation-73675

Simulation Set-up The main purpose of this challenge is to run the shock tube simulation using CONVERGE CFD. The simulation is set up based on the tutorial video. The mesh size is dx=dy=dz=0.001m and an adaptive mesh refinement is used. The following figure shows the two different regions. The green region (Region…

https://projects.skill-lync.com/projects/Conjugate-Heat-Transfer-Simulation-48974

Baseline configuration The main purpose of this challenge is to simulate the heat transfer from a heated aluminium pipe to air using CONVERGE CFD. The pipe is heated with a constant heat flux of 10000 W/m^2. The desire Re number is 7000 which corresponds to 7.18m/s (Inlet Velocity). Both the grid dependence and the effect…

https://projects.skill-lync.com/projects/Prandtl-Meyer-Shock-problem-79916

1. Shock flow boundary conditions There are three types of boundary conditions. Dirichlet BC, Neumann BC and mixed BC. Flows in which Shock Waves appear, are supersonic and do not use the static (gauge) pressure at the outlet boundary. This means that, at the outlet, pressure and all other flow quantities are extrapolated…

https://projects.skill-lync.com/projects/Transient-simulation-of-flow-over-a-throttle-body-73376

The main purpose of this challenge is to simulate the transient flow in a elbow shape pipe using CONVERGE CFD. The simulation is set up based on the tutorial videos. In the following graphs, we can see the different boundaries of the model and the mesh grid for two positions of the throttle. On the left side, the initial…

https://projects.skill-lync.com/projects/Steady-state-simulation-of-flow-over-a-throttle-body-03727

The main purpose of this challenge is to simulate a flow over a throttle body using CONVERGE CFD. The simulation is set up based on the tutorial videos. In the following figure, both of the elbow shape pipe and the throttle are shown. The flow was simulated for 3 different mesh in order to end up with a well refined computational…

The main purpose of this challenge is to simulate a flow over a backward facing step using CONVERGE CFD. The simulation is set up based on the tutorial videos and the only parameters that have been changed are the mesh grid density (number of computational cells) and the total number of cycles. In the following graphs,…

The main purpose of this challenge is to simulate a channel flow using CONVERGE CFD. The simulation is set up based on the tutorial videos and the only parameters that have been changed are the mesh grid density (number of computational cells) and the total number of cycles. In the following graphs, we can see the mesh…

A. Matlab Script for blockMeshDict clear all; close all; clc; %% Input Parameters Re = 2100; % Reynold\'s Number d = 0.01; % Pipe diameter r = d/2; % Pipe radius Lentrance = 0.05*Re*d; % Pipe Entrance Length mu = 8.9e-4; % Water viscosity (25oC) rho = 997; % Water density (25oC) nu = mu/rho; % Water kinematic viscosity…

A. Matlab Script for blockMeshDict clear all; close all; clc; %% Input Parameters Re = 2100; % Reynold\'s Number d = 0.01; % Pipe diameter r = d/2; % Pipe radius Lentrance = 0.05*Re*d; % Pipe Entrance Length mu = 8.9e-4; % Water viscosity (25oC) rho = 997; % Water density (25oC) nu = mu/rho; % Water kinematic viscosity…

A. BlockMesh Script /*--------------------------------*- C++ -*----------------------------------*\\ | ========= | | | \\\\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\\\ / O peration | Version: 4.0 | | \\\\ / A nd | Web: www.OpenFOAM.org | | \\\\/ M anipulation | | \\*---------------------------------------------------------------------------*/…

clear all; close all; clc; % Import Data A = [5 1 2;-3 9 4;1 2 -7]; % Matrix 3x3 U = [0 A(1,2) A(1,3);0 0 A(2,3);0 0 0]; % Upper triangular elements D = [A(1,1) 0 0;0 A(2,2) 0;0 0 A(3,3)]; % Diagonal elements L = [0 0 0;A(2,1) 0 0;A(3,1) A(3,2) 0]; % Lower triangular elements B = [10;-14;33]; m = 1; % Diagonal Magnification…

Interpolation Schemes The approximations of the surface and volume integrals require values of the variable (Temperature, velocity etc.) at locations other than the computational nodes of the computational volume (at the faces of the computational volume). So, values at these locations are obtained using interpolation…

A. Main script % Main program clear all close all clc % inputs variables n = 61; L = 3; x = linspace(0,L,n); % Courant number c = 0.5; % Throat Node throat = ((n-1)/2)+1; % Time steps nt = 1400; % Non conservative form [m,computational_time_nc,ind,grid_ind_param] = non_conservative_eq(n,L,c,nt,throat); % Conservative form…

A. Explicit Solver - Unsteady (Gauss Jacobi) % Explicit Solver - Unsteady clear all close all clc % Initial Variables nx = 40; ny = nx; L = 1; % unit square domain x = linspace(0,L,nx); y = linspace(0,L,ny); dx = 1/(nx-1); dy = 1/(ny-1); dt = 0.01; alpha = 1e-4; % CFL CFL = alpha*dt/dx^2; % Temperature Matrix and BC T…