Week 3 - External flow simulation over an Ahmed body.

Finite volume method : The finite volume method (FVM) is a method for representing and evaluating partial diffrential equations in the form of algebraic equations. In the finite volume method, volume integrals in a partial differential equation that contain a divergence term are converted to surface…

Aim:Solving the steady and unsteady 2D heat conduction problem. Transient 2D heat conduction (implicit) Steady state Transient 2D heat conduction (explicit) Code: clear all close all  clc   number_node = 10; domain_length = 1;   x = linspace(0,domain_length,number_node); y = linspace(0,domain_length,number_node);…

CODE: clear allclose allclc x= pi/3;dx= linspace(pi/4,pi/4000,20);for i=1:length(dx) central_differencing(i) = fourth_order_central_differencing(x,dx(i)); right_sided_skew(i) = fourth_order_right_sided_skew(x,dx(i)); left_sided_skew(i) = fourth_order_left_sided_skew(x,dx(i)); end figure(1)loglog(dx,central_differencing,'r')hold…

Aim: To perfrom a Parametric study on Gate valve. Procedure: The gate valve is the fluid valve that opens by lifting the barrier gate from the path of the fluid flowing thriugh a pipeline. Gate valves require generally very less space and are and can be fitted along the pipe axis and they hardly restict any fluid…

Aim: To Perform a steady-state conjugate heat transfer analysis on a model of a graphics card. Procedure: Step 1:Open spaceclaim and import the geometry and share topology. Step 2: Mesh the enclosure and the graphics card. Step 3:Assign the cfd model and a solver. Step 5:Assign the materials and energy source as 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 μm to  5 μm and…

Aim: To perform CHT Analysis on Exhaust port using ANSYS FLUENT. Theory: CHT analysis type allows for the simulation of the heat transfer between the solid and liquid domains by exchanging thermal energy at the interface between them. Procedure: Step 1: Open spaceclaim and prepare volume by deleting the unnecessary…

Aim: To perform  Rayleigh Taylor Instability using ANSYS FLUENT. Theory: In Rayleigh Taylor, the acceleration is constant and the fluid configuration is unstable as the density gradient is in opposite direction. Practical models: behavior of water suspended above oil, volcanic eruptions Procedure: Step 1: Open spaceclaim…

Aim: To study the External flow simulation over an Ahmed body using ANSYS fluent. Ahmed body significance: The Ahmed body is a simplified car-shaped made-up of a parallelepiped with rounded edges at the front and a slanted face at the rear. The slant at the rear side of the vehicle causes the separation of flow…

Aim: To study the Flow over a Cylinder using ANSYS FLUENT. Theory: YPlus Procedure: Step 1: Open spaceclaim and create the 2D cylinder with appropriate dimensions. Step 2: Mesh the surface with 0.25m element size triangle. Step 3: Setup the simulation- steady state with velocity of 2.5m/s, density of  1kg/m3…

Aim : To perform CFD Meshing for Tesla Cyber Truck. Procedure:  Step 1: Cut the model into 2. Since the model is symmetrical about the axis. Resolve all the errors present.   Step 2: Assign PID to the parts of the cars and use the copy and symmentry option to form the other part of the car. Step 3: Create the wind tunnel…

Aim: To study the CFD analysis of Mixing Tee Theory: convergence of fluids. Application: HVAC ducts. Procedure: Step 1:Import the geometry to spaceclaim and extract the volume. Step 2:Open mesh option and assign face name and mesh the surface. Step 3:Open setup, assign the solver k-epsilon or k-omega and assign the…

Aim : To perform CFD Meshing for Tesla Cyber Truck. Procedure:  Step 1: Cut the model into 2. Since the model is symmetrical about the axis. Resolve all the errors present.   Step 2: Assign PID to the parts of the cars and use the copy and symmentry option to form the other part of the car. Step 3: Create…

Aim: To perform Surface wrap on Automotive Assembly. Procedure: Step 1: Delete the unwanted rings and other overlapping surfaces present in the engine and close the open valves. Step 2: Delete the unwanted rings and other overlapping surfaces present in the transmission system, sue the or option to isolate PIDs. Step…

Aim : To perform CFD Meshing for BMW car using ansa. Procedure: Step 1: Check for the single cons and triple cons. Step 2: Divide the car into 2 due to symmentry and rectify the mistakes. Make sure the joining surface only has single cons. step3: Perform meshing on the surface. step 4: Assign indivdual components…

Aim: To perform CFD meshing on Turbocharger using ANSA. Procedure: step 1: Perform geometry check to locate the errors in the model.   Step 2: rectify the errors using topo, fillhole, release, coons. step 3: Assign individual components PID after closing the inlets and outlets. Step 4: perform Surface mesh according…

Aim: To perform Surface meshing on a Pressure valve using ANSA for target lengths of 1mm, 3mm and 5mm. Procedure: Step 1- Open the model in topo mode in ANSA. Perform a geometry check,if there are any errors, it can be noticed with the red lines. Step 2- Use surface algorithms to to remove the holes from the surface…