Week 5 - Turbulence modelling challenge

Aim: Broadband Noise modelling over Ahmed body Objectives: Describe Ahmed's body and its importance. Setup the domain and setup assuming body is travelling at 110 kmph Run the setup till convergence and plot for static pressure and coefficient of drag and lift to check for convergence Turn on Broadband- modelling and detail…

Aim:To simulate the motion of blades in a generic turbomachinery component using an unsteady approach. Objectives: Appropriate time step for the simulation and generate an animation file for the rotation. Theory:  Difference bewteen Frame motion and Mesh motion approach. 1. Independent mesh for each zone   …

Aim: To simulate moving zones approach in Ansys Fluent. Objective: Simulate rotary motion for the given geometry and plot velocity profile of the fluid motion. Theory: There are two types of fluid flow motions. 1. Rectilinear 2. Rotary Under Rotary fluid flow motion, there are two approaches, 1. Moving reference frame.…

Aim: To setup the domain for analysis of flow over an airfoil at subsonic and supersonic regime. Objectives: Analysis at 3 different angles of attack (5, 10 & 15 deg) for the airfoil and comparision of the lift and drag coefficient in all cases. Theory: During flight, the behavior of airflow over an aircraft…

Aim: A study on Turbulence modelling, Wake region of Gulf ball using CFD simulation Objectives: To review various turbulence models and explain why DNS isn’t feasible according to Kolmogorov's scale. To perform a 3D simulation and to explain the recirculation region using velocity vectors. Consider the flow…

 1. A pitot static tube geometry is attached below.     a.You are required to do a literature review of pitot-static tube. Also establish a relationship between Total (stagnation) pressure and static pressure     b.You are required to create surfaces and fill it separately for Total pressure port…

Task: Consider the converging-diverging nozzle below with the dimensions.  For the following boundary conditions,    At Inlet, Pressure = 1atm and Temperature = 300K. The outlet pressure= 0.027 atm. In the operating conditions, consider the reference pressure to be zero. Plot: The pressure, velocity and…

Aim: To simulate a validation study for Symmetry BC vs Wedge BC in OpenFOAM vs Analytical HP equation with angles to test as below. Angles to test: `10^o` `25^o` `45^o` Reference Data: The flow is laminar and flows through a constant cross-section pipe at an inlet Reynold's number of 2100. also to validate results…

Aim: To solve second-order ODEs. Mathlab Program: Main Program ODE FUNCTION CODE :   Output:  

Aim: To write a program in Matlab to simulate the forward kinematics of a 2R Robotic Arm. Theory: Kinematics: Kinematics is the study of the relationship between a robot's joint coordinates and its spatial layout and is a fundamental and classical topic in robotics. Kinematics can yield very accurate calculations in many…

Aim: To perform a combustion simulation on the combustor model. Objectives: 1. Plot the variation of the mass fraction of the different species in the simulation using line probes at different locations of the combustor. 2. To check the effect of adding water to the fuel from 5% to 30% by mole and observe the…

                                                          Week 9 - Parametric study on Gate valve Aim: To perform a parametric study on the gate valve simulation by setting…

Aim:- To perform analysis on the cyclone separator and calculate the separation efficiency and pressure drop.   Objective:- 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…

                                                                          CHT Analysis on a Graphics card Aim: Perform a steady-state conjugate heat transfer analysis on a model of a graphics card and run the simulation for coarse and refined mesh.  Objectives: Run the simulation by varying the velocity from 1m/sec to…

                                                                          CHT Analysis on a Graphics card Aim: Perform a steady-state…

                                                                                   Rayleigh Taylor Instability…

Aim: 1. Describe why and where the CHT analysis is applicable. 2. Calculation of the Y+ value for the turbulence model. 3. To Calculate the wall/surface heat transfer coefficient on the internal solid surface & show the velocity & temperature contours in appropriate areas. 4. Verify HTC prediction and factors…

                                                                       Project 1: CFD Meshing for Tesla Cyber Truck Aim: To check and solve…

Aim: To check the geometrical errors & delete surfaces that are unwanted for a Surface wrap. After clearing geometry, Merge all 3 models and perform surface wrap. The target length for Wrap = 3 mm Procedure:  Engine Model: Delete unwanted surfaces and keep all necessary surfaces & PIDs for a wrap.…

Aim: To check and solve all geometrical errors on half portion of the model (Car) and Assign appropriate PIDs. Perform meshing with the given Target length and element Quality criteria. Generating surface mesh of all the PIDs. Target lengths are specified below. Body - 3 mm Lights - 4 mm Grills - 1 mm Rims and Tyres…

Aim: To create error free geometrical, assign PIDs, Surface mesh & Volumetric mesh for the given target lengths. Given data: Turbocharger 3D model with open surfaces.  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 casing cover = 5 mm Procedure:…

AIM: Geometry Topo cleanup and generate mesh for 1 mm, 3 mm & 5 mm target lengths.  PROCEDURE: 1. Open the model in ANSA CFD and check for Geometry status with the ANSA Checks tool.                                     note:…

Aim: To simulate an axis-symmetric flow by applying the wedge boundary condition. Reference Data: The flow is laminar and flows through a constant cross-section pipe at an inlet Reynold's number of 2100. also to validate results with the Hagen- Poiseuille's equations for the fully developed flow. write code…

AIM: To run the simulation on Ahmed's Car body to get the Drag & Lift coefficient values.  To describe            Q1. Describe Ahmed's body and its importance.          Q2. Explain the reason for the negative pressure in the wake region.           Q3. Explain the significance of the point of separation.  Expected Results:…

Aim: Simulate the flow over a cylinder and explain the phenomenon of Karman vortex street.    Introduction:  It is well known that the flow past a circular cylinder at a critical Reynolds number combines flow separation, turbulence transition, reattachment of the flow, and further turbulent separation of…

Aim: Steady-state simulations to compare the mixing effectiveness when the hot inlet temperature is 360C & the Cold inlet is at 190C Objectives: k-epsilon and k-omega SST model to be performed for the cases below. Case 1   1a. k-epsilon model Short mixing tee with a hot inlet velocity of 3m/s. Momentum…

Aim:- Explain the major differences between FDM & FVM and understand the need for interpolation schemes and flux limiters in FVM. Theory: In Fluid Dynamics there are three numerical-method-based solvers which are used to solve for the governing equation of Navier-Stokes - Finite Difference Method - Finite…

Aim: Simulation of a backwards-facing step in OpenFOAM Objectives: to simulate an incompressible-laminar-viscous flow through the backwards-facing step                           geometry          Case 1 - Simulate…

Aim: Simulation of a 1D Super-sonic nozzle flow simulation using the Macormack Method. Objectives:  To derive both the conservation and non-conservation forms of the governing equations and solve them using MacCormack's technique. To determine the steady-state temperature distribution for the flow-field variables…

AIM:- To Solve the steady and unsteady 2D heat conduction problem using the Iterative method Objective:- To perform Steady-state analysis & Transient (Unsteady) State Analysis. To understand the different iterative techniques used to solve the steady and unsteady 2D heat conduction problem  Theory:- Heat conduction…

A Taylor series is a series expansion of a function about a point. It represents a function as a infinite sum of derivatives. one dimensional Taylor series for a function at X=a is given by, F(x)=f(a)+f’a*(x-a)+f’’(a)/2! (x-a)2+f’’’(a)/2!(x-a)3+…….fn(a)/n!(x-a)n If the…