Adiabatic Flame Temperature calculation   (Cantera, Skill Lync, Easy)

Aim: To simulate a case of ahmed body and check for grid independence of the solution. Objectives: 1) To know about an ahmed body. 2) To setup a case of ahmed body. 3) To understand the effect different mesh methods and refinement techniques. 4) To post-process each feature of flow pattern observed in ahmed body.…

Aim: To compare the performance of 2 piston bowl profiles (Open W and Omega) using CFD.   Introduction: Internal combustion engines have been used for transportation and other purposes from a long time now. Still, the designing process of these engines continues. New designs with more efficiency and power are made.…

Aim: To setup a full hydro simulation for case of gasoline engine (PFI) using Converge CFD.   Introduction: Internal combustion engines have been used for transportation and other purposes from a long time now. Still, the designing process of these engines continues. New designs with more efficiency and power are…

Aim: To simulate the flow inside a shock tube using Converge CFD   Introduction: Shock tube is an experiment setup which is used to find auto ignition conditions of fuel air mixture. It is one of the uses of shock tube. The shock tube setup consists of a tube divided in two parts, high pressure and low pressure region,…

Aim: To setup conjugate heat transfer simulation in Converge CFD and also observe the effect of super-cycle interval on computation time.   Introduction: When there are multiple modes of heat transfer inside the simulation, the simulation is called a conjugate heat transfer (CHT) simulation. In this report, a CHT…

Aim: To simulate Prandtl Meyer expansion fan problem using Converge CFD.   Introduction: When a fluid flowing at supersonic velocity passes over a convex corner of surface, it produces a discontinuity in flow properties which is called the expansion fan. The fluid is flowing at so high speed that it tries to not follow…

Aim: To simulate a transient flow over throttle body using Converge CFD   Introduction: A throttle body is a device that controls the amount of air fuel mixture entering the combustion chamber of IC engine. The motion is controlled by accelerator pedal of driver. When accelerator pedal is pressed, the throttle valve…

Aim: To simulate a case of steady flow over the throttle valve using Converge CFD.   Introduction: The throttle valve, used in IC engines, is a circular disc placed near to intake manifold which controls the mass flow rate of air fuel mixture entering the combustion chamber. Depending on the vaccum inside intake manifold…

Aim: To simulate the flow over backward facing step using Converge CFD and observe some of its characteristic features.   Introduction: When a new turbulence model setting is to be tested for its accuracy, the flow over backward facing step is simulated using the test model. The results are compared to experimental…

Aim: To simulate laminar flow in a channel in 2D.   Introduction: The laminar flow in pipe is a very simple problem which can be a good problem to start with learning a new CFD software. In this report, a channel flow is simulated for 3 mesh sizes. The analysis is in 2D, so the shape of cross section of channel won't…

Aim: To find the flame speed using Cantera for 1D premixed CH4-Air and H2-Air combustions. Introduction: The flame speed is the measured rate of expansion of the flame front in a combustion reaction. In an internal combustion engine, the flame speed of a fuel is a property which…

Aim: To carry out sensitivity analysis and find 10 most sensitive reactions affecting temperature of methane-air combustion.   Introduction: The real life combustion processes have multiple intermediate reactions and species, which increase the total number of reactions in mechanism. Simulating combustion using these…

Aim: To understand the effect of initial pressure and temperature on auto ignition time delay.   Introduction: The fuel air mixture can automatically combust if it attains proper environment to do so. It depends on temperature, pressure, equivalence ratio of mixture, etc. The lowest temperature at a given environment…

Aim: To understand and create a program for Multivariate Newton Raphson method.   Introduction: In many areas of engineering, especially in combustion simulations, the equations which are to be solved are differential equations. Even when the problem under consideration will be small, the equations will be interdependent…

Aim: To write a derivation of compact notation for a simple mechanism to form expressions for production rates of different species   Introduction: Each reaction has several intermediary reactions which take place between initial and final steps of reactions. These all make up a reaction mechanism. The rates…

Aim: To calculate the effect of preheating the inlet air on AFT, cycle efficiency and fuel savings.   Introduction: The products of combustion, having high temperature, expand in turbines and cool down to certain temperature. The efficiency of turbine never reaches 100%, so after expansion there is some amount of…

Aim: To use 'Quantity' class in cantera to perform combustion of methane.   Introduction: The combustion of methane using cantera can be done by passing temperature, pressure and mole fractions of species to a single object instance like: gas.TPX = 298.15, ct.one_atm, {'CH4': 1, 'O2': 2, 'N2': 7.52} But by doing so,…

Aim: 1) To calculate adiabatic flame temperature for given species in constant volume combustion chamber. 2) To calculate adiabatic flame temperature for given species in constant pressure chamber (considering effect of product at initial reactant temperature). 3) Observing the effect of bond strength and number of carbon…

Aim: To learn combustion analysis in ANSYS Fluent. Introduction: Combustion is a high-temperature exothermic redox chemical reaction between a fuel and an oxidant, that produces oxidized, often gaseous products, in a mixture termed as smoke. In complete combustion, the reactant burns in oxygen, and produces a limited number…

Aim: To learn setting up a discrete phase modelling case in ANSYS Fluent. To calculate efficiency of the given cyclone geometry. To analyze total erosion on the separator’s surface due to the particles. Introduction:                A cyclonic separation…

Aim: To learn simulation of dynamic mesh by using user defined function. Introduction:                Many of the CFD applications require a transient study on the object. Usually, the object itself moves from its position in time. To simulate this,…

Aim: To learn to set up a parametric simulation in ANSYS Fluent using Gate valve lift problem   Introduction:                A Gate valve is a device used to restrict the flow of water in variable amounts. The main parts of gate valve are body,…

Aim: To learn analysis of multiphase flows in ANSYS Fluent To simulate the Rayleigh Taylor instability problem Introduction:                A Rayleigh Taylor instability is an instability of an interface between two fluids of different densities which…

Aim: To perform CHT analysis on graphic card. Objectives: 1) To learn the procedure for CHT analysis in ANSYS Fluent 2) To understand various meshing concepts and methods 3) To infer various physical parameters from the simulation Introduction:      A CHT (Conjugate Heat Transfer) analysis is useful where…

Aim: 1) To understand the concept of CHT (Conjugate Heat Transfer) analysis and its applications. 2) To perform a CHT analysis (setting up the case, meshing, solving, post-processing). 3) Validation of result.   Contents: 1) CHT analysis - theory 2) CHT analysis - practical 3) Validation   Part 1: CHT analysis…

Aim: 1) To explain interpolation schemes used in FVM 2) To explain flux limiter and implement it using MATLAB code   Contents: 1) Interpolation schemes 2) Flux limiter - Theory 3) Flux limiter - Code   Part 1: Interpolation schemes:      In FVM, the solution is obtained by solving governing differential…

Aim: To perform simulation of Hagen Poisuelle flow in a circular pipe using OpenFOAM(part 2) (using symmetry boundary condition).   Notes: In last part of this project, the same problem was simulated but with a change. While I used wedge boundary conditions for two faces of wedge in last part, here I am using increasing…

Aim: To perform analysis for Hagen poiseuille flow in pipe using OpenFOAM & MATLAB (Part 1) Introduction: A basic hagen poiseuille flow is the one which is developed when laminar flow just starts to flow inside a pipe. The velocity profile gets on developing from straight vertical to a parabolic one as the fluid moves…

Aim: To simulate the backward facing step problem and to analyze the solution obtained by using different mesh grading factors. This mesh grading is to be done by editing blockMeshDict file. Theory: The flow through a backward step problem is solved here using OpenFOAM. For this, geometry of 5 blocks was used so as to…

Aim: To compute flow variables for 1D Subsonic Supersonic Flow Nozzle using MacCormack method for conservative and non-conservative equations. Theory:  A subsonic-supersonic flow nozzle is a type of nozzle in which the inlet throat has Mach number of flow below 1, at throat it is equal to 1 and in divergent outlet…

Aim: To Solve 2D Heat Conduction Equation in Transient and Steady State using explicit and implicit Iterative Methods (Jacobi, Gauss Seidel & SOR).   Data: 1) Domain is unit square area. 2) Boundary Conditions: (Temperatures)             1) Left = 400 K            …

Aim: 1)To derive 4th order approximation of second order derivative using central difference and skewed right and left difference methods. 2) To plot a figure that compares error in above mentioned methods with respect to analytical derivative at particular value of x and range of dx.   Theory: In numerical computation…

Aim: To write a program that solves the following ODE which represents the equation of motion of a simple pendulum with damping.   Solution: Used parameters L=1 metre, m=1 kg, b=0.05. g=9.81 m/s^2. Simulated the motion between 0-20 sec, for angular displacement=0,angular velocity=3 rad/sec at time t=0.   Code:…