Week 12 - Validation studies of Symmetry BC vs Wedge BC in OpenFOAM vs Analytical H.P equation

External flow simulation over an Ahmed body. Objective - To perform external flow simulation over an Ahmed body ,by considering the only half body. Also Run the simulation for the velocity of 25 m/sec with the default air properties in fluent. Describe Ahmed's body and its importance. Explain the reason for the…

Flow over an Airfoil. Objective - To Simulate flow over a 4 digit airfoil i.e NACA 2412 Airfoil. To plot Drag co-efficient Vs Angle of Attack To Plot Lift co-efficient vs Angle of Attack To keep the inlet Reynolds number is 200,000 .      NACA 4 digit airfoil specification This NACA airfoil series is controlled by 4 digits…

Literature review RANS derivation and analysis Objective -Apply the Reynolds decomposition to the Navier-Stokes equation to find the expression for the Reynolds stress. Also understand the difference between turbulent viscosity and molecular velocity.   Introduction Reynolds number: The…

Shock tube simulation project. Objective -The main goal of this project was to set up a transient simulation of a shock absorber tube using Converge CFD. A shock tube with a membrane in between, with one side of the tube filled with high-pressure nitrogen and the other side…

Conjugate Heat Transfer Simulation  Objective -To simulate the flow through the solid pipe "Conjugate Heat transfer" and understand super cycling. Introduction Heat transfer coefficient Give a brief description of why and where a CHT analysis is used. It is a heat transfer analysis between solids and fluids. This…

Prandtl Meyer Shock problem Objective - To visualize the Prandtl Meyer expansion fan over an expansion corner using converge  Understand the effect of SGS parameter on the shock location. To understand the shock waves in the Prandtl Meyer shock problem and look at the effect of SGS temperature value on cell count…

Transient simulation of flow over a throttle body  Aim - To perform transient simulation of flow over a throttle body Objective  -Set up a transient-state simulation of flow across the throttle body during convergence. Export all input files and run the simulation in Cygwin.…

Project Steady state simulation of flow over a throttle body.   Aim - To perform Steady state simulation of flow over a throttle body. Objective  -Set up a steady-state simulation of flow across the throttle body during convergence. Export all input files and run the simulation in Cygwin. Contour representation of flow velocity…

Aim - Channel flow simulation using CONVERGE CFD  Objective Setup channel flow simulation. Run simulation for 3 different mesh sizes. Plot velocity and pressure contours for all 3 mesh sizes. Show plots for velocity, pressure, mass flow rate, and total cell count for all 3 mesh sizes.  Introduction Channel Flow …

Aim - Flow over a backward facing step Objective - To Simulate the flow of air over Backward facing step. The case should be run with 3 different mesh sizes Post processing of the flow parameters dx = dy = dz =2e-3 m dx = dy = dz =1.5e-3 m dx = dy = dz =1.0e-3 m      Backward facing step Backward-Facing…

CHALLENGE FOR GATE VALVE SIMULATION: 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…

Aim - 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 & Soot formation. To add the water content…

 Simulating Cyclone separator with Discrete Phase Modelling 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…

CHT Analysis on a Graphics card Aim - To conduct conjugate heat transfer analysis on graphics card. Objective - To Perform a steady-state conjugate heat transfer analysis on a model of a graphics card. To find the effect of different velocities on the temperature. Simulate by varying the velocity from 1m/sec to 5m/sec…

Rayleigh Taylor Instability 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 with the…

CHT Analysis on Exhaust portObjectives: 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 & temperature…

Simulate the flow over a cylinder and explain the phenomenon of Karman vortex street. Calculate the coefficient of drag and lift over a cylinder by setting the Reynolds number to 10,100,1000,10000 & 100000.Discuss the effect of Reynolds number on the coefficient of drag. [ Results should be validated with any standard…

For this challenge, we have created two versions of the mixing tee. One of them is longer than the other. Your 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.  Case 1  Short mixing tee with a hot inlet velocity of…

For the given model, check and solve all geometrical errors and Assign appropriate PIDs. Perform meshing with the suitable Target length and element Quality criteria. Target lengths for the different parts of a model can be decided by your own. Finer mesh will give good results and will compromise with the longer processing…

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. Target length for Wrap = 3 mmWrite a detailed report on steps followed to finish this challenge. Objective - To check…

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. Target lengths for the different parts of a model are as follow: Body - 3 mm Lights…

For the given model, check for the geometrical errors to make appropriate volumes. Create and assign PIDs as shown in the video. Perform surface mesh with the given target lengths as per PIDs. Blade stage-1 = 1 mm Blade stage-2 = 1 mm Impeller = 2 mm Shaft rotor = 1 mm Turbo casing = 5 mm Compressor casing = 5 mm Inlet…

For the given model, check for the geometrical errors and perform Topology cleanup accordingly. Set three different target lengths as three different cases and mesh the model.  Target length = 1mm, 3 mm and 5 mm (i.e. 3 cases) Element type = Tria Objective -  To create a surface mesh on a pressure valve using…

Validation studies of Symmetry BC vs Wedge BC in OpenFOAM vs Analytical H.P equation. Validate Hydro-dynamic length with the numerical result Validate the fully developed flow velocity profile with its analytical profile Validate maximum velocity and pressured drop for fully developed flow Post-process Shear stress and…

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. You can do a transient or steady state simulation and you will validate your results with the Hagen- Poiseuille's equations for the fully developed…

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 technique. You need to determine the steady-state temperature distribution for…

Simulate an incompressible-laminar-viscous flow through the backward facing step geometry. You should perform a transient simulation. The solver can be chosen based on the described physics of the flow. perform 2 case studies as described below and compare the results. Case 1 - Simulate the flow without using any…

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 = 800 K The following methods for solving implicit equations. 1. Jacobi 2.…

What is Finite Volume Method(FVM), write down the major differences between FDM & FVM. Also, describe the need for interpolation schemes and flux limiters in FVM. Objective - To describe the need for interpolation schemes and flux limiters in FVM In computational fluid dynamics, there are 3 solvers based on numerical…

Derive the following 4th order approximations of the second-order derivative.  1. Central difference 2. Skewed right-sided difference 3. Skewed left-sided difference Objective - To derive the 4th order approximations of the second-order derivative using taylor table method for Central difference, Skewed right-sided…

Write a function that extracts the 14 co-efficients and calculates the enthalpy, entropy and specific heats for all the species in the data file. Objective- To write a code for a function that extracts the 14 co-efficients and calculates the enthalpy, entropy and specific heats for all the species in the data file by using…

Write the code for the given ODE which represents the equation of motion of a simple pendulum with damping Objective- To write a program that solves the following ODE. This ODE represents the equation of motion of a simple pendulum with damping. Simulate the pendulum motion between 0-20 sec, for angular displacement=0,angular…

Write a code in MATLAB to optimise the stalagmite function and find the global maxima of the function. Objective- To optimise the stalagmite function and find the global maxima of the function ,write a code for that. plot graphs for all three studies and for F maximum vs no. of iterations.  clear…

Writing code for 2R Robotic arm Challenge. clear all close all clc %definition of length of link 1 and 2 l1= 2 l2 =0.3 %definition of angles theta1= linspace(0,90,20); theta2= linspace(0,90,20); ct=1; %calculation of positions for i= 1:length(theta1) temp1 = theta1(i); for j= 1:length(theta2) temp2 =theta2(j); x0= 0; y0…