Week 3 - External flow simulation over an Ahmed body.

AIM: Volumetric Meshing for the required Volumes of a Model of Turbocharger using Ansa. OBJECTIVE:  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 casing cover = 5 mm THEORY:…

AIM: SURFACE WRAP ON AUTOMOTIVE ASSEMBLY Objective: Target length for Wrap = 3 mm Write a detailed report on steps followed to finish this challenge. Given Models: Engine: Gear Box: Transmission: First we have to do Topology Clean: Delete the unwanted Surfaces like Rings and Overlaped Surfaces. The Engine has alot of excess…

AIM: 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. Given Conditions: Target lengths for the different parts of a model are as…

AIM: Perform Topology cleanup and surface Meshing of the Pressure Valve using ANSA  OBJECTIVE: Target length = 1mm, 3 mm and 5 mm (i.e. 3 cases) Element type = Triangular Mesh METHODLOGY:- Step1. Import a Geometry and check  the Geometry  First we have to check the Geometry. Go to checks> geometry>…

MULTIVARIANT NEWTON RAPHSON METHOD FOR SOLVING STIFF ODE's Objective: To Solve the problem using Implicit Euler Method/Backward Differencing, assume the initial conditions as y1 = 1, y2 = 0, and y3 = 0 respectively. Also take alpha (relaxation factor) = 1 and Simulation time t = 10 minutes. Choose a suitable step…

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                                                                  AUTO IGNITION USING CANTERA AIM: Simulate the Auto Ignition Time for Methane in the…

REPORT OF LITERATURE REVIEW OF ODE STABILITY Contents: When does a ODE become unstable? How does stability affect engineering simulations? Can stability condition be derived for all types of problems? Program on Python to show the ODE stability. 1.1  When does a ODE become unstable? When a Solution to Ordinary…

AIM: Compact Notation Derivation for simple Mechanism:- Objective: Derive the reaction rate ODEs & production of each species for the simple reaction mechanism given below and use the compact notation. Also writing the desired matrices. Reaction Mechanism:- One of the major reasons for studying chemical kinetics is…

COMBUSTION EFFICIENCY CALCULATION AFTER PRE-HEATING BY RECUPERATOR (HEAT EXCHANGER)  A recuperator is a special purpose counter-flow energy recovery heat exchanger positioned within the supply and exhaust air streams of an air handling system, or in the exhaust gases of an industrial…

AIM: To determing the Adiabtaic Flame Temperature for the combustion of Methane and air at the Stiochiometric conditions and at constant pressure by handling mixtures of methane and air as two seperate quantities using the Quantity Class in the Cantera The Stiochiometric equation for Methane: 1. Use the "moles" method/function,…

ADIABATIC FLAME TEMPERATURE CALCULATION ON THE BASIS OF DIFFERENT CASES USED IN THIS REPORT: Adiabatic Flame Temperature: The adiabatic flame temperature (AFT) is defined as the temperature attained when all of the chemical reaction heat released heats combustion products. In practical coal combustion systems,…

  Non-Pre Mixed Combustion Analysis Report Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed…

AIM:- To perform a parametric study on the gate valve simulation by setting the opening from 10 % to 80%.  OBJECTIVE:- Obtain the mass flow rates at the outlet for each design point. Calculate the flow coefficient and flow factor for each opening and plot the graph. Discuss the results of the mass flow rate and flow…

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.  Part A: To perform an analysis on a given cyclone separator model by varying…

AIM:- Perform a steady-state conjugate heat transfer analysis on a model of a graphics card. OBJECTIVE:- Run the simulation for best possible mesh with combination of coarse and refined mesh in different regions by varying the velocity from 1, 2.5, and 10 m/sec. To find out the maximum temperature and heat transfer…

OBJECTIVE:- Some practical CFD models that have been based on the mathematical analysis of Rayleigh Taylor waves. Explain how these mathematical models have been adapted for CFD calculations. Perform the Rayleigh Taylor instability simulation for 2 different mesh sizes with the base mesh being 0.5 mm. Compare the results…

AIM:- To Simulate the flow over a cylinder and explain the phenomenon of Karman vortex street.     OBJECTIVE:- Simulate the flow with the steady and unsteady case and calculate the Strouhal Number for Re= 100 and show that the flow has converged for both approches. Calculate the coefficient of…

OBJECTIVE:- To understand the concept and its importance of Conjugate Heat Transfer (CHT) and also its applications. Simulate Exhaust port model in ANSYS FLUENT Software while maintaining the Y+ value in the Turbulence Model and also calculate the Heat transfer coefficient on the internal surface. Do the Heat transfer…

Objective:- The Aerodynamic behaviour of a Ahmed body is numerically investigated in the present work by using the Commerical Software ANSYS FLUENT for the simulation using a Turbulent model. In this case we are considering the only half Ahmed body for the best practice where you can save on the number of cells and get…

AIM :- To compare the mixing effectiveness in short and long T section of pipe or duct when hot inlet temperature is 360C & the Cold inlet is at 190C. and also use the k-epsilon and k-omega SST model for this study. Objective :- we have to study these both cases Case 1  Short mixing tee with a hot inlet…

AIM:-Literature review on FVM and FDM and their differences also describe the needs for interpolation schemes and flux limiters in FVM by using the 1D linear heat conduction equation as an example.  THEORY:- Finite volume method (FVM) can be used on all differential equations, which can be written in the divergence…

AIM: To simulate an incompressible-laminar-viscous flow through the backward facing step geometry and should perform a transient simulation using multiple meshes refining mesh grading factors inside blockMeshDict file of blockMesh using openfom with the help of icoFoam solver. Mesh specifications: Number of cells…

AIM: To simulate the isentropic flow through a quasi 1D subsonic-supersonic nozzle. Derive both the conservation and non-conservation forms of the governing equations and sovle them using the MacCormack's technique.  OBJECTIVE: Solving isentropic flow through a quasi 1D subsonic-supersonic nozzle for conservative…

AIM: Write a code to solve the 2D heat conduction equation by using the point iterative techniques for steady and transient state heat condcuction equation. Objective: Implement the following methods for solving implicit equations.  Jacobi  Gauss-seidel  Successive over-relaxation Given inputs: Boundary…

AIM: Write a program in Matlab to evaluate the second-order derivative of the analytical function exp(x)*cos(x) and compare it with the 3 numerical approximations that we have derived. OBJECTIVE: Derive the following 4th order approximations of the second-order derivative.  Central difference Skewed…

AIM:- write a function on MATLAB that extracts the 14 coefficients and calculate the enthalpy, entropy and specific heats for all the species with the help of file parsing concept. In this data we will be reading the 'NASA thermodyanmic data'. OBJECTIVE:- function that extracts the 14 coefficients and calculate…

AIM- write a code to optimize the stalagmite function and to calculate the global maxima of the functtion and explain the syntax of genetic algorithm (GA) in MATLAB OBJECTIVE To write a code in MATLAB to optimize the stalagmite function and find the global maxima of the function. To explain the concept of genetic algorithm…

AIM - To write a program on for simulating the transient behaviour of a simple pendulum. OBJECTIVE: To write a program that solves the following ODE. This ODE represents the equation of motion of a simple pendulum with damping. THEORY: ODE is used to describe the transient behaviour of a system. A simple example is a pendulum.…