Week 3 - External flow simulation over an Ahmed body.

Unsteady moving zones Approach Aim: To simulate the motion of blades in a generic turbomachinery component using an unsteady approach. Given data: Assume blade rotation at 300rpm Procedures: Import the mesh file stepwise in fluent set up using append option. general set up     time step for the simulation : Rotational…

Moving zones approach in Fluent Aim: To study Moving zones approach in Fluent. Objectives: To understand  the approaches by which we would model moving zones. To understanf which approach would we use to model unsteady phenomena. To simulate rotary motion for the geometry given and plot the velocity profile of…

Turbulence modelling challenge Aim:To perform turbulence modelling of golf ball. Objectives: To do a literature review of various turbulence models explained in the Turbulence modeling video (Week-5) and explain why DNS isn’t feasible according to Kolmogorov's scale. For the below geometry performs a 3D simulation…

Week 3 - Pitot tube Aim:To simulate pitot tube Objectives: a)To do a literature review of pitot-static tube. Also establish a relationship between Total (stagnation) pressure and static pressure.b)To create surfaces and fill it separately for total pressure port and static pressure port as shown below. To calculate the…

Week 2 - Converging diverging nozzle Aim:To simulate airflow through a converging diverging nozzel. Objectives: To plot the pressure, velocity and temperature variations across the domain To find the variation of Mach number across the domain and at what distance from the inlet does the flow become supersonic. Given Data:…

Project 1 : CFD Meshing for Tesla Cyber Truck Aim:To perform CFD Meshing for Tesla Cyber Truck. Objectives: To check and solve all geometrical errors To assign appropriate PIDs. To perform meshing with the suitable Target length and element Quality criteria. Wind tunnel  Procedures: Open the given model in asna…

Surface wrap on Automotive Assembly Aim: To perform surface wrap on Automotive Assembly Objectives: 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. Procedure:…

CFD Meshing for BMW car Aim:To perform surface mesh to Wind tunnel surfaces for BMW car. Objectives: To check and solve all geometrical errors on half portion and Assign appropriate PIDs. To perform meshing with the given Target length and element Quality criteria. To do symmetry to the other side after meshing the…

CFD meshing on Turbocharger Aim: To perform  CFD meshing on Turbocharger. Objectives: To check for the geometrical errors to make appropriate volumes of the given module. To create and assign PIDs . To perform surface mesh with the given target lengths as per PIDs. To perform volumetric mesh for the required volumes.…

Surface meshing on a Pressure valve Aim:To perform surface meshing on a Pressure valve. Objectives: 1.To check for the geometrical errors  2.To perform Topology cleanup accordingly. Cases: Target length = 1mm, 3 mm and 5 mm (i.e. 3 cases) Element type = Tria Procedure: 1.Open the model in ansa. 2.Check the geometry.…

Simulating Combustion of Natural Gas Aim:To perform a combustion simulation on a given combustor model and to observe the variation of mass fraction of different species in the simulation. Objectives: To perform a combustion simulation on the combustor model and plot the variation of the mass fraction of the different…

CHT Analysis on a Graphics card Aim:To perform a steady-state conjugate heat transfer analysis on a model of a graphics card. Objectives: To run the simulation by varying the velocity from 1m/sec to 5m/sec for at least 3 velocities and discuss the results. To find out the maximum temperature and heat transfer coefficient…

Rayleigh Taylor Instability Aim:To perform the Rayleigh Taylor instability simulation Objectives: To explain some practical CFD models that have been based on the mathematical analysis of Rayleigh Taylor waves. To perform the Rayleigh Taylor instability simulation for 2 different mesh sizes with the base mesh being 0.5…

Parametric study on Gate valve Aim:To perform a parametric study on the gate valve simulation by setting the opening from 10 % to 80%.  Objectives: To obtain the mass flow rates at the outlet for each design point. To calculate the flow coefficient and flow factor for each opening and plot the graph. Discuss the results…

Simulating Cyclone separator with Discrete Phase Modelling Aim:To perform analysis on cyclone separator and calculate the separation efficiency and pressure drop.   Objectives: To write a few words about any four empirical models used to calculate the cyclone separator efficiency.  To perform an analysis…

CHT Analysis on Exhaust port Aim:To perform CHT analysis on exhaust port using Ansys Fluent. Objectives:   To give a brief description of why and where a CHT analysis is used. To maintain the y+ value according to the turbulence model and justify the results.  To calculate the wall/surface heat transfer coefficient…

External flow simulation over an Ahmed body Aim:To simulate external flow over an Ahmed body. Introduction and Theory:(Ans for Q1) Ahmed's body and its importance:The Ahmed body is a geometric shape first proposed by Ahmed and Ramm in 1984. The shape provides a model to study geometric effects on the wakes of ground vehicles…

Simulate the flow over a cylinder and explain the phenomenon of Karman vortex street Aim:To simulate the flow over a cylinder and explain the phenomenon of Karman vortex street. Objectives: To simulate the flow with the steady and unsteady case and calculate the Strouhal Number for Re= 100. (Part-I) To calculate the coefficient…

Mixing Tee Aim:To set up steady-state simulations to compare the mixing effectiveness when hot inlet temperature is 360C & the cold inlet is at 190C.  Objectives: 1.To set up steady-state simulations (Using the k-epsilon and k-omega SST model) Case 1  Short mixing tee with a hot inlet velocity of 3m/s. Momentum…

Validation studies of Symmetry BC vs Wedge BC in OpenFOAM vs Analytical H.P equation Aim: To simulate the pipe flow by applying Symmetry Boundary Condition. Objectives: 1.To simulate the pipe flow for the below-mentioned angles using both symmetry and wedge boundary conditions and validate them with HP equations . Angles…

Simulation of flow through a pipe using OpenFOAM Aim: To simulate an axisymmetric flow by using the wedge boundary condition.  Objectives:  1. To perform a transient/steady state simulation. 2. To validate the results with Hagen-Poiseuille's equation for the fully developed flow. 3. To write a code in Matlab…

 FVM Literature Review Finite Volume Method(FVM): The finite volume method (FVM) is a discretization technique for partial differential equations, especially those that arise from physical conservation laws. FVM uses a volume integral formulation of the problem with a finite partitioning set of volumes to discretize the…

Simulation of a backward facing step in OpenFOAM Aim: To simulate an incompressible-laminar-viscous flow through the backward facing step geometry. Objectives: 1. To perform a transient simulation.  2. To perform 2 case studies Case 1 - Simulate the flow without using any grading factor (i.e., GF = 1) Case…

Simulation of a 1D Super-sonic nozzle flow simulation using MacCormack's Method Aim: To simulate the isentropic flow through a quasi 1D subsonic-supersonic nozzle. Objective: To derive both the conservation and non-conservation forms of the governing equations and solve them using MacCormack's technique. To determine the…

Solving the steady and unsteady 2D heat conduction problem Aim: To solve the 2D heat conduction equation by using the point iterative techniques (Steady state analysis & Transient State Analysis) Given Problem: The Boundary conditions for the problem are as follows; Top Boundary = 600 K Bottom Boundary = 900 K Left…

Deriving 4th order approximation of a 2nd order derivative using the Taylor Table method   AIM: 1. To derive the following 4th-order approximations of the second-order derivative.  1. Central difference 2. Skewed right-sided difference 3. Skewed left-sided difference 2. To write a program in Matlab to evaluate…

Rankine Cycle Simulator  AIM: To create a Rankine Cycle Simulator using MATLAB. OBJECTIVES: 1. To calculate the state points of the Rankine Cycle. 2. To plot the corresponding T-s and h-s plots for the given set of inputs.  3. To calculate Net work output Back work ratio THEORY: The Rankine…

Project 1 - Parsing NASA thermodynamic data AIM: To write a code in MATLAB for parsing the NASA thermodynamic data file and then calculate the thermodynamic properties of various species. OBJECTIVES: 1. To write a function that extracts the 14 coefficients and calculates the enthalpy, entropy, and specific heats for all…

   Genetic Algorithm Aim: To write a code in MATLAB to optimise the stalagmite function and find the global maxima of the function. Objectives: To explain the concept of genetic algorithm and the syntax for ga in MATLAB  Plot graphs for all 3 studies and for F maximum vs no. of iterations.…

The equation (ODE ) of motion of a simple pendulum with damping AIM:  To write a program in MATLAB that solves the ODE of the simple pendulum with damping.   GOVERNING EQUATION:   Θ= Θ1 d Θ/ dt = d Θ1/dt = Θ2 d2 Θ/ dt2 = d2 Θ1/ dt2=   d/dt (d Θ1/…

FINAL PROGRAMME % Forward kinematics of a 2R Robotic arm clear all close all clc % inputs %link1link2 l1=1 l2=0.5 %angle theta1=linspace(0,90,20) theta2=linspace(0,90,20) 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=l1*sind(THETA1) x2=x1+l2*cosd(THETA2)…

  clear all close all clc %input gamma=1.4 t3=1926 % state variables at state point 1 p1=100000 t1=293 % engine geometric parameter bore=.1; stroke=.1; cr=9; co_rod=.15; %calculating the swept volume and clearance volume v_swept=pi/4*bore^2*stroke; v_clearance=v_swept/(cr-1); v1=v_swept+ v_clearance; v2=v_clearance;…