Numerical analysis of flow over Ahmed body using ANSYS fluent

Objective 1: To convert 3D intake manifold (plenum.stl) to 1D GT model using GEM3D Step 1: Importing plenum.stl to GEM 3D first, open file to open plenum.stl model. Select Next and then make sure the Surface radio button is selected before selecting Next for the second window. Since STL files do not contain unit information,…

Objective: 1. To model 4 cylinder diesel engine with DI pulse(predictive) combustion model 2. To Study the effect of Start of ignition(SOI) and rail pressure on BSFC and NOx emission. Also to optimize BSFC and NOx emission by considering SOI and rail pressure as parameters.   Optimization: Optimization is the selection…

Objective: To explore aftertreatment integrated SI and CI engine model in GT suite and study the results. Emissions: 1. Unburnt hydrocarbons (HC) 2. oxides of carbon (COx) 3. oxides of nitrogen (NOx) 4. oxides of sulphur (SOx) 5. Solid carbon particles (Soot)   Generally, HC, CO and NOx are dominant emissions in gasoline…

Objective 1: To build Fast running engine model (FRM) using FRM Converter approach Fast running model(FRM):  Fast Running Engine Models are dynamic, fully-physical engine models that are designed specifically to run fast. While high-fidelity engine models are commonplace in the engine performance department, they…

A turbocharger is a turbine-driven, forced induction device that increases an internal combustion engine\'s efficiency and power output by forcing extra compressed air into the combustion chamber.This improvement over a naturally aspirated engine\'s power output is due to the fact that the compressor can force more…

Objective: 1. To model a heavy duty CI engine to suit target specifications 2. To perform case study on naturally aspirated, turbocharged and EGR engine.   Engine specifications: Type: CI engine Number of cylinders: 4 Bore(mm): 100 Stroke(mm): 110 Capacity: 3.455 L Connecting rod length(mm): 220 Compression ratio:…

Objective:  1. To compare 1cyl SI and 1cyl DI model and list down the differences. 2. To comment on following parameters: BSFC Exhaust Temperature Air/Fuel Ratio 3. To determine the effect of MBD 50(Main burn duration) on performance.   Introduction: Homogenous Mixture: In spark ignition(SI) engines a nearly…

Objective: 1. To simulate two dimensional laminar flow over a cylinder using both steady and transient approach 2. To visualize vortex shedding and determine frequency of vortex shedding and strouhal number.   l. Introduction: 1.1 Vortex shedding: Vortex shedding is an oscillating flow that takes place when a fluid…

Objective:  1. To simulate 1 cylinder SI Engine using GT SUITE at 1800 RPM and 3600 RPM 2. To increase the power output at 3600 RPM by 10%. Introduction:  Indicated power(ip): The Indicated Power is defined as the power produced due to combustion of fuel within the cylinder in an IC Engine.In reciprocating…

Abstract: Cyclone separators are separation devices that use the principle of inertia to remove particulate matter from flue gases. Numerical analysis of cyclone separators are essential in determining the performance efficiency of cyclone separator by determining the percentage of particulate matter removed from carrier…

Objective: 1. To perform numerical analysis of flow through T-joint. 2. To determine the area weighted average and standard deviation of temperature at outlet. 3. To determine the effect of increase in length of pipe and increase in velocity of cold fluid on the mixing effectiveness of the T-joint.   T-joint: A T-joint…

OBJECTIVE: To briefly discuss finite volume method and the need for interpolation schemes and flux limiters in finite volume method(FVM). Theory: In computational fluid dynamics, there are 3 commonly used numerical method based solvers to solve the governing equations .i.e Navier strokes equations.These three methods are:…

Objectives: 1. To model a practically used Gasoline direct ingnition(GDI) engine using GT-SUITE and obtain Max power and Max Torque conditions.  2. To Analyse the results and list down the impact on important parameters.   Engine specifications: Type: 1.5L 4-Cylinder inline naturally aspirated gasoline direct…

Abstract: In present work, Numerical analysis of Non- premixed combustion of methane-air is performed using Eddy- dissipation model. Eddy dissipation model is implemented because under some combustion conditions, fuels burn quickly and the overall rate of reaction is controlled by turbulent mixing. In eddy dissipation…

Abstract: Gate valve is a valve by lifting a barrier(gate) out of the path of the fluid.Gate valve helps in regulate or shut the fluid flowing in a pipe. In present work, parametric study on flow through gate valve is performed by setting five design points of gate valve lift. Mass flow rate and area weighted average velocity…

Abstract: The gearbox is a vital component of many industrial applications,because they transport mechanical power and change the speed factor of motors. Gearboxes must work efficiently to get the job done properly and lubrication is vital to this efficiency. Lubricating oils serve a few purposes, including providing…

OBJECTIVE: 1.To write a matlab program that compares first order,second order and fourth order approximations of first order derivative against analytical or exact derivative and to plot the truncation error as bar graph. 2.To study the effect of grid size(dx) on first order, second order and fourth order approximations…

OBJECTIVE: 1. Write a Matlab program that extracts the 14 coefficients and calculates the enthalpy,entropy and specific heats in the data file. 2. Calculate the molecular weight of each species and display it in the command window. 3. Plot the Cp, Enthalpy and entropy for the local temperature range( low temperature: high…

OBJECTIVE: 1.To solve the steady and transient(implicit and explicit) 2D heat conduction equation using jacobi,gauss- seidal and successive over relaxation iterative techiques in matlab. 2.To calculate and compare the simulation time and number of iterations taken to converge for each transient solver. 3. To determine…

OBJECTIVE: To perform surface mesh of given cylinder using ANSA MESH: A mesh is a discretization of a geometric domian into small simple shapes,such as triangles or quadrilateral in two dimensions and tetrahedra or hexahedra in three dimensions.Mesh are essential in numerical solution of differential equations…

OBJECTIVE: Write a code in MATLAB to optimise the stalagmite function and find the Global maxima of the function using generic algorithm. INTRODUCTION: 1.Generic Algorithm: Genetic Algorithms(GAs) are adaptive heuristic search algorithms that belong to the larger part of evolutionary algorithms. Genetic algorithms are…

OBJECTIVE: To derive the fourth order approximations of second order derivative using central difference scheme, skewed right sided difference and skewed left sided difference and compare their truncation error.   Taylor table for central difference scheme: Fourth order central diiference approximation is taken for…

OBJECTIVE: 1. Write a matlab program that calculates the numerical solution of one dimensional linear convection equation by explicit method 2. To determine the effect of number of grid points on numerical solution. 3. To determine the effect of time step size on numerical solution.   One- Dimentional Linear…

OBJECTIVE:  To write a matlab program for curve fitting of Temperature vs Cp data and to measure its goodness of fit parameters. INTRODUCTION: 1. CURVE FITTING Curve fitting is the process of contructing a curve, or mathematical functions,which possess the closest proximity to a real series of data. By curve fitting…

Abstract: Processors in the electronic devices such as graphics card,CPUs etc tends to get heat up which results in decrease in preformance or damage of the electronic devices. Proper cooling system of these electronic devices is essential.Therefore in our present case, numerical conjugate heat transfer analysis of a graphics…

 Objective: To perform numerical analysis of Rayleigh taylor instability(air-water) using Volume of fluid(VOF) multiphase method in ANSYS fluent.   Rayleigh taylor instability: Rayleigh taylor instability is an instability of an interface between two fluids of different densities which occurs when the lighter…

Objective: To perform numerical Conjugate heat transfer(CHT) analysis on exhaust port. Conjugate heat transfer(CHT): The term conjugate heat transfer is used to describe processes which involve variations of temperature within solids and fluids, due to thermal interaction between the solids and fluids. A typical example…

Objective: 1. To perform numerical analysis on flow over Ahmed body and to perform grid dependence test.   Ahmed body and its importance: Ahmed body has the form of a highly simplified car, consisting of a blunt nose with rounded edges fixed onto a box-like middle section and a rear end that has an upper slanted surface…

Objective: 1. To solve two-dimensional flow over backward step using icoFoam solver, which is transient incompressible, laminar flow of newtonian fluids in openfoam. 2. To analyse velocity profile change as a function of mesh grading factor(0.2, 0.5,0.8 and 1) Flow Domain: The computational flow domain is a two dimensional…

OBJECTIVE:  1. To solve Quasi-1D isentropic subsonic supersonic flow throught convergent divergent nozzle using Maccormack's Technique in Matlab. 2.To solve using both conservative and non-conservative form of governing equations and compare their results. 3. To determine mininmum number of cycles required in order…

OBJECTIVE: To perform volume meshing of a turbocharger suitable for cfd analysis using ANSA. Google drive link for meshed file: https://drive.google.com/open?id=1yG-xll44UYXqTVxaaYDpb3WE5Gz6377x Turbocharger: A Turbocharger is a turbine driven forced induction device that increases internal combustion engine\'s efficiency,…