Week 8 - Simulation of a backward facing step in OpenFOAM

Objective - To perform geometrical clean-up, and surface mesh a cyber truck. Tool - ANSA Procedure- Import the geometry. Geometry clean-up Geometry simplification and PID Assignment Removing cons close to each other and finding target length Surface Meshing pid target length minimum maximum rear lights 15 10 20 glass 15…

Objective - To perform geometrical clean-up, and surface mesh a cyber truck. Tool - ANSA Procedure- Import the geometry. Geometry clean-up Geometry simplification and PID Assignment Removing cons close to each other and finding target length Surface Meshing pid target length minimum maximum rear lights 15 10 20 glass 15…

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 mm - Write a detailed report on steps followed to finish this challenge.…

Aim: The aim is to create the single volume between BMW car & wind tunnel to perform external Objective: For the given model of BMW car, 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…

CHALLENGE-3:  CFD Meshing on Turbocharger   AIM: To perform volumetric meshing (CFD Meshing) on the given Turbocharger.   OBJECTIVE: To open the given Turbocharger geometry in ANSA and to cleanup the geometry appropriately. To carry out triangular meshing on the surface of geometry with different target…

Aim : To perfrom topology cleanup along with geometric errors by setting up three different target lengths for three different cases. Prerequisite: Target lengths are 1mm,3mm,5mm                     Element type is Tria Workflow: Fix the geometric errors by patching…

Aim: To perform a combustion simulation on given combustor model and to observe the variation of mass fraction of different species in the simulation. Objective: Part 1 1) Perform a combustion simulation and plot the variation of mass fraction of different species in the simulation using line probe at different location.…

INTRODUCTION       A gate valve controls the media's flow by lifting the gate (open) and lowering the gate (closed). A gate valve's distinct feature is the straight-through unobstructed passageway, which induces minimal pressure loss over the valve. The unobstructed bore of a gate valve also allows for a…

AIM:  To simulate the flow through a cyclone separator and showing the results for the different particle size and for the different velocities. we have to run the simulation for the six cases   1).set the velocity constant to 3 m/s and do simulation for the varying size of the particle. 2).set the…

  OBJECTIVE: Simulate by varying the velocity from 1m/sec to 5m/sec for at least 3 velocities and discuss the results. Find out the maximum temperature and heat transfer coefficient attained by the processor. Prove that the simulation has achieved convergence with appropriate images and plots. Identify potential hotspots…

   The Rayleigh–Taylor instability, or RT instability, is the instability of an interface between two fluids of different densities which occurs when the lighter fluid is pushing the heavier fluid. Examples include the behavior of water suspended above oil in the gravity…

Objective :   In this challenge,  * We will ,give a brief description of why and where a CHT analysis is used.  * We wil simulate both fluid flow and also the heat transfer to the solid i.e., CHT Analysis on an Exhaust port * Then we will calculate the wall heat transfer coefficient on the internal…

INTRODUCTION  * The Ahmed body is simplified car body used in 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 the vehicle…

  Flow over cylinder: *In spite of extensive experimental and numerical studies almost over a century, flow around a circular cylinder still remains a challenging problem in fluid mechanics, where intensive investigations are continued even today to understand the complex unsteady dynamics of the cylinder wake flow.…

                                    Mixing Tee Effectiveness * Objective To clean the geometry and mesh it in pre-processing. To solve the model…

MATLAB CODE FOR CREATING BLOCKMESHDICT FILE:   clear all close all clc theta=45; %wedge angle Re =2100;%Reynold's number D =0.01;%Diameter R =D/2;%Radius Le =0.05*Re*D; %hydrodynamic entry length L =Le+0.4; %Total length %Temperature = 25degree celsius mu =8.90*10^-4; %Dynamic viscosity rho =997; %density nu =8.9267*10^-7;…

  Hagen- Poiseuille's equations    * Hagen–Poiseuille law, Poiseuille law or Poiseuille equation, is a physic law that gives the pressure drop in an incompressable and newtonian fluid in laminar flow flowing through a long cylindrical pipe of constant cross section * The assumptions…

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* First start terminal in Linux Operating system using ctrl+alt+T buttons on key board or  right click -> Open Terminal. * we have to simulate our problem in openFOAM and we are going to solve our problem using tutorials present in openFOAM, therefore, just type ‘tut’ to open OpenFOAM tutorial…

Introduction: * Direct numerical stimulation of fluid flow through nozzle has always been a challenging problem and an area of immense interest for modern engineers. * Converging-Diverging nozzle has been extensively used in a wide range of Industrialapplications ranging from steam turbines to rocket engine nozzles. *…

  MAIN PROGRAM FOR STEADY STATE ANALYSIS: clear all close all clc % Steady state analysis n = 50; % number of grid points x = linspace(0,1,n); dx = x(2)-x(1); dy = dx; y = linspace(0,1,n); T = 298*ones(n,n); % initial temperature condition T(:,1) = 400; % K ,temperature left boundary condition T(end,:) = 600; % K…

FUNCTION PROGRAMS:   FUNCTIONS FOR CENTRAL DIFFERENCE FOURTH ORDER ERROR AT PARTICULAR SPACING 'DX':   % Creating function for the 4th order approximation of the second-order; derivative using central difference;   function error_central_differencing = central_difference(x,dx)     % Analytical…

clear all close all clc %file parsing f1=fopen("THERMO.dat",'r'); fgetl(f1) A=fgetl(f1); b=strsplit(A,''); global_low_temp = str2double(A(2)); global_high_temp= str2double(A(3)); global_mid_temp = str2double(A(4)); %skipping next three lines for i=1:3 fgetl(f1); end %Reading the species for i=1:53 header=fgetl(f1); X=strsplit(header,'…

MAIN PROGRAM clear all close all clc % DEFINING OUT SEARCH SPACE x=linspace(0,0.6,150); y=linspace(0,0.6,150); % CREATING A 2DIMENSIONAL MESH [xx, yy]=meshgrid(x,y); % EVALUATING THE STALAGMITE FUNCTION for   i=1:length(xx)   for j=1:length(yy)    input_vector(1)=xx(i,j);    input_vector(2)=yy(i,j);…

clear all close all clc   b=0.02; g=9.81; l=1; m=0.1; %initial condition   theta_0=[0;5]; %time points   t_span=linspace(0,50,500); %solve ODE   [t,results]=ode45(@(t,theta)ode_func(t,theta,b,g,l,m),t_span,theta_0); plot(t,results(:,1)) hold on plot(t,results(:,2)) xlabel('time') ylabel('plot') legend({'displacement','velocity'})…

clear all close all clc %inputs l1=1; l2=0.5; theta1=linspace(0,90,40); theta2=linspace(0,90,40); 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= l2*sind(THETA1); x2= x1 + l2*cosd(THETA2); y2= y1 + l2*sind(THETA2); % plotting plot([x0 x1],[y0…