Ahmed body and its importance

Sensitivity Analysis is used to identify the parameters that affet a computed solution the most. It has proven invaluable in combustion studies, where the number of parameters is typically large. The main aim of the following code is to calculate the ignition delay of methane using a sensitivity analysis which will show…

Auto-Ignition:- Autoignition occurs when a mixture of gases or vapors ignites spontaneously with no external ignition source and after reaching a certain temperature, the autoignition temperature. The autoignition temperature is not an intrinsic property of the gases or vapors (Kanury 1975) but is the lowest temperature…

Multivariate Newton Rapshon Method:- In numerical analysis, Newton's Method also known as the Newton-Raphson method is a root.  Finding algorithms which produce successively better approximation to the root or zeros of a real values function. The most basic version start with a single variable function defined for…

What is Stability? Stability means that errors at any stage of the computation are not amplified but are attenuated as the computation progresses. In terms of the solution of a differential equation, a function f(x) is said to be stable if any other solution of the equation that starts out sufficiently close to it…

Reaction mechanism CO+O2⇔CO2+OCO+O2⇔CO2+O O+H2O⇔OH+OHO+H2O⇔OH+OH CO+OH⇔CO2+HCO+OH⇔CO2+H H+O2⇔OH+OH+O2⇔OH+O Compact notation: ⎡⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢⎣jSpecies1CO2O23CO24O5H2O6OH7H⎤⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥⎦[jSpecies1CO2O23CO24O5H2O6OH7H] ⎡⎢ ⎢ ⎢ ⎢ ⎢ ⎢⎣jReactions1R12R23R34R4⎤⎥ ⎥ ⎥ ⎥ ⎥ ⎥⎦[jReactions1R12R23R34R4]…

1) Effect of preheating on the adiabatic flame temperature The effect of preheating air on Adiabatic Flame Tempreature (AFT) of CH4 was calculated. The Quantity class method of Cantera was used to created a Mixture Methane/Air to determine the AFT. Combustion efficiency is a measurement of how well the fuel burned is being…

Aim : We will be using the Quantity Class of Cantera to create various mixtures and explaining how mixture calculations is performed. 1. Use the "moles" method/function of the A object and explain how it was calculated. In this process we will be considering a mixture of Methane and Air. CH4+2(O2+3.76N2)→CO2+2H2O+7.52N2">CH4+2(O2+3.76N2)→CO2+2H2O+7.52N2CH4+2(O2+3.76N2)→CO2+2H2O+7.52N2…

1. Equivalence Ratio One of the most important features of a combustion process is the highest temperatureof the combustion products that can be achieved. The temperature of the productswill be greatest when there are no heat losses to the surrounding environment and all ofthe energy released from combustion is used to…

Objective:-To perform an analysis of the cyclone separator and calculate the separation efficiency and pressure drop. 1.The empirical models used for cyclone separator efficiency Cyclones are devices that employ a centrifugal force generated by a spinning gas stream to separate particles from the carrier gas. Their simple…

Objectives: To simulate the parametric study on the gate valve simulation by setting the opening from 10 % to 80%. And, 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. To Discuss the results of the mass flow rate and…

2 . Phase animation  Case1 Case 2 Case 3

Objective:- To Perform a CHT analysis on an exhaust manifold. 1. Conjugate heat transfer analysis : The term conjugate heat transfer (CHT) is used to describe processes which involve variations of temperature within solids and fluids, due to thermal interaction between the solids and fluids. Conjugate heat transfer corresponds…

Objectives: To define the Ahmed body and its importance. To Simulate flow over the Ahmed body. To perform the grid dependency test and post process the results Ahmed Body and Its Importance:- Ahmed body is a simplified car body and was first created by S.R Ahmed.This shape provides a model to study geometrical effects…

Objective: To uderstan the theory of formation of expansion fan due to infinite mach waves, originated at the sharp convex corner To understan the reason for the usage of Neuman BC at the outlet for supersonic flow To understan the effect of SGS parameters on shock location To undestand the effect of using subsonic initial…

Objectives:-  To run simulation of two pistons with different profiles on a CAT 3410 engine and to compare their respective parameters. Theory:- The CAT 3410 engine is a heavy duty diesel engine produced by caterpillar. This engine is generally used for industrial applications. The geometry of the piston head plays…

Objective:- To simulate the full hydro setup of a port fuel injected engine which uses isooctane as the fuel and based on the results from the simulation calculate the following parametrs Compression ratio Combustion efficiency power and Torque Significance of CA10, CA50 and CA90 Geometry and Boundry Flagging:- The…

Objective :   To apply Reynolds decomposition to the Navier-Stokes equations and come up with the expression for Reynolds stress. Intruduction: Reynolds Number:- The Reynolds number is the ratio of inertia force to viscous force withinin a fluid which is being subjected to relative internal movement due to different…

Objectives: Setup a transient shock tube simulation  Plot the pressure and temperature plots in the domain. Plot the cell count as a function of time Intruduction: Shock tube are the devices which are mostly used to study the chemical kinetics. It basically is a tube with two chambers and a diaphram separating the…

OBEJECTIVES: Simulation of flow over a throttle body using converge studio cfd software. Simulation is carried for two different mesh conditions and analysed with respective to the velocity profile at the outlet of the flow. Once the mesh is refined well ,the simulation is carried out for differnt CFL no and checked for…

OBJECTIVE: Conjugate heat transfer throuhg cylinder. Performing grid dependency test and observing the effect of change in super-cyling interval. Spercycling: In fliuid H.T takes place faster than the solid region, therfore to over come this fluid solver is made to freeze periodicaaly while the heat transfer in solid…

OBJECTIVES: Perform a transient simulation for the flow of air over a throttle body in converge studio and post process the results in paraview Show the plots for the pressure , velocity amd mass flow rate The trottle valve should rotate by a given angle during the simulation time Geometry: The throttle inside the pipe…

Objectices of the project: 1). Calculation of flow variables 2). Generation of blocMeshDict using the wedge boundry condition. Create the blockmesgdict file in Matlab such that the mesh is automatically created for various wedge angle. 3). Simulating the pipe flow in OpenFoam using icoFoam solver. 4). Post process the…

Objective of the project: 1) calculation of flow variables. 2) Generation of blockMeshDict using the wedge boundry condition. Create the blockMeshDict file in Matlab such that the mesh is automatically created for variable. 3). Simulation the pipe flow in OpenFOAM using icoFoam solver. 4). Post prosess the velocity profile…

Objective: The objective of the this study is to make a backward facing step block by editing blockMeshDict file and simulate it in openFOAM and post prosess the result like velocity profile near the step zone and to check the effect of grading scheme. On velocity profile.     Fisrt the bacward step facing…

A brief explanation of Interpolation schemes and Flux limiters in finite volume method:    some of the interpolation schemes used are Linear, Quadratic and other interpolation schemes. These methods are used toget to mor realistic results as the engineering problems basically uses the real world envirment. Here…

Plots : 1. Comparision of CDS, SLDS, SRDS 2. Comparision of SDS,SLDS,SRDS,FD and BD       II. Matlab program Main script clear all close all clc % calculating the derivative of function %% given function, f(x)=exp(x).sin(x); % f\'\'(x)=-2.exp(x).sin(x); %% assuming x=pi/3 x=pi/3; %% Definig the grid size…

We consider the steady , isotropic through a convergent-divergent nozzlw. The flow at the inlet to the nozzle comes from a reservoir where pressure and tempertures are at stagnation. Also it is assumed that the cross sectional area of the nozzle is very lagre so that the velocity is almost V=0. The flow expands adiabatically…

matlab code as plots are atteched below: clear all close all clc % steady state heat conduction n = 11; T = zeros(n,n); % initial temperature condition T(:,1)=400; % boundry condition left T(:,n)=800; % boundry condition right T(1,:)=600; % boundry condition top T(n,:)=900; % boundry condition bottom T_old1=T;T_old2=T;T_old3=T;…