Week 10 - Simulating Combustion of Natural Gas.

What is the Compression ratio for the engine? Compression ratio is the ratio of maximum volume of cylinder when the piston is at bottom dead centre to the minimum volume of cylinder when the piston is tdc. From the below graph Vmax and Vmin value were found out,     Compression ratio=Vmax/Vmin Compression ratio=(Vc+VS)/Vc…

  Geometry-A 3d geometry of Port fuel injection engine was imported to converge for analysis. Make Engine Sector Surface: Using the make surface utility in converge studio both the open W sector and omega sector of piston was extracted.  Open W Piston Profile: Omega Piston Profile: Geometry for Open W Piston:…

ASSIGNMENT NAME- FULL HYDRO case set up (PFI) OBJECTIVE-Simulate a full hydro condition of Port fuel injection engine. Geometry-A 3d geometry of Port fuel injection engine was imported to converge for analysis. Setup-  Application Type- Crank angle-based IC engine Physical Parameters: Bore =0.086 m                Stroke…

Name of Project: -Surface Preparation and Boundary Flagging ( No hydro Simulation) Objective: Perform surface preparation and boundary flagging tasks on our IC Engine case and setup a No Hydro Simulation Introduction – Surface preparation and boundary flagging is important steps before we go case setup. These terms…

ASSIGNMENT NAME: - Literature Review - RANS Derivation and Analysis Objective: - To apply Reynolds decomposition to the NS equation to get the RANS equation What is turbulence? In Fluid Dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow…

Assignment name – Shock Tube simulation using Converge Objective: - Setup a transient shock tube simulation Plot the pressure and temperature history in the entire domain - Explain the result Plot the cell count as a function of time - Explain the result Introduction: The shock tube is an instrument used to…

Aim- CHT analysis on solid pipe Objective: To study of effect of super cycling on simulation Perform grid independency test for three different grid size Introduction: Conjugate heat transfer is coupled, fluid structurer, heat transfer where conduction heat transfer in solid wall interacts with fluid flow and convection…

Assignment number 05 Objective To visualize the Prandtl Meyer expansion fan over an expansion corner using converge and understand the effect of SGS parameter on the shock location. Introduction-Prandtl Meyer Shock A supersonic expansion fan, technically known as Prandtl–Meyer expansion fan, a two-dimensional…

Assignment number 04 Assignment Name- Transient State Simulation of flow over throttle body using converge Objective Simulate flow over throttle body Post process results and show Pressure contours and velocity contours Show Mesh (Surface with edge) Create the animation in which throttle movement should be visible Steps…

Assignment number 03Assignment Name- Steady State Simulation of flow over throttle body using convergeObjectiveSimulate flow over throttle bodyPost process results and show Pressure contours and velocity contoursShow Mesh (Surface with edge)Create the animation in which throttle movement should be visibleStepsImported…

Assignment Name: Simulate the flow over backward facing step Objective: Run 3 simulations 3 different base mesh sizes are, dx = 2e-3m,              dy = 2e-3m,       dz = 2e-3m dx = 1.5e-3m,          …

                                       Channel Flow Simulation Using Converge-CFD Aim: To perform a channel flow simulation using…

Assignment number 8 Assignment name-sensitivity analysis of methane combustion using cantera Aim-write the code that takes the all reactions from the GRI mechanisms and calculate 10 most sensitive reactions. Parameter should be with respective to temperature Sensitivity analysis In chemistry sensitivity analysis is performed…

Assignment no.07 Assignment name-auto ignition using cantera Auto ignition -auto ignition is the spontaneous ignition of a fuel and air mixture without any external source of ignition. The lowest temperature at which it spontaneously ignites is called auto ignition temperature. The time of auto ignition (ignition delay)…

Assignment number 06 Title-Multivariate Newton Raphson technique Aim- to solve the set of ODE equations using multivariate Newton Raphson Technique. The given set of ODE’s are dy1/dt= -0.04*y1+〖10〗^4*y2*y3 dy2/dt= 0.04*y1-〖10〗^4*y2*y3-3*〖10〗^7*〖y2〗^2 dy3/dt=3*〖10〗^7*〖y2〗^2 The problem is discretised using Implicit…

Assignment-ode stability literature review Consider given ODE is    dy/dx= -1000y-e^t We know numerical scheme are two types 1.explicit 2.implicit Euler forward difference (Explicit): y_(n+1)=y_n+hf(y_n,t_n) y_(n+1)=y_n+∆t(-1000y_n+e^tn) After simplification we get y_(n+1)=y_n (1-1000∆t)-∆te^tn Where (1-1000) = growth…

Assignment no.03 (Cantera) Assignment Name-Combustion efficiency after preheating Aim-to study the effect of preheating temperature on adiabatic flame temperature and combustion efficiency and also saving fuel Introduction- Recuperator- A recuperator is a special purpose counter-flow energy recovery heat…

 Assignment no. 04-Compact Notation Derivation for a simple Mechanism Objective-Derive the reaction rate ODEs of simple reaction mechanism. To use the compact notation and find out the desired matrices Reaction mechanism:   Where Kf= rate of forward reaction Kr=rate of reversed reaction The rate of change of…

                                Assignment No.-02 Assignment name-mixing handling with cantera 1.Use mole fraction method of the object A and calculate moles CH4 + 2(O2+3.76N2) = CO2 +2H2O + 7.52N2 Mole fraction is defined as number of moles…

Assignment no. 1 Assignment name- Adiabatic Flame Temperature (python and cantera) Objective of this assignment- Case 1- Determine effect of equivalence ratio on AFT in a constant volume chamber for methane. Write the program in python and compare with cantera Case 2-To calculate the AFT for methane combustion with heat…

Aim- To simulate combustion of natural gas Objective- Perform a combustion simulation on the combustor model and plot the variation of mass fraction of the different species at different locations with using line probes In case 2 add water content in the fuel from 5% to 30% by the mole and observe the effect of it on the…

Aim-parametric study of gate valve Objective- Perform simulation at different lift Calculate flow coefficient and flow factor Mass flow rate at output Introductions- Gate valves are primarily designed to start or stop the fluid flow, and when a straight-line flow of fluid and minimum restriction to flow is needed. In service…

Assignment Name- CHT on graphics card Aim- perform simulation of CHT on Graphics Card with varying velocities and calculate heat transfer coefficient Objective- Run the simulation by varying the velocity from 1m/sec to 5m/sec for at least 3 velocities and discuss the results. Find out the maximum temperature and heat transfer…

Assignment name-Rayleigh Taylor Instability (ANSYS FLUENT) Aim-perform simulation of Rayleigh Taylor Instability Objective- perform Rayleigh Taylor Instability Simulation for 2 different mesh with base mesh being 0.5mm (choose air & Water) Perform one more simulation with water and user defined material Define Atwood…

Assignment name- CHT (conjugate heat transfer -exhaust port analysis) Objective- perform CHT analysis on an exhaust port and give necessary plot How would you verify HTC prediction from the simulation is corrected? Factors on which prediction accuracy depends Why CHT (conjugate heat transfer) is required- The conjugate…

                      Assignment- simulation of Ahmed body (Ansys Fluent) Aim-perform simulation of Ahmed body and also perform grid independency test and also provide darg and lift coefficient values for each case Ahmed body and its importance Ahmed body and Importance…

                                             Assignment-simulation of flow over cylinder  Aim-Simulate…

                                                         Assignment Name- mixing tee  Aim-To simulate the flow of air through missing tee and study the effect of length of…

Assignment name- Simulation of Flow through a pipe in Open Foam (part 2)   Objective- To developed a program in MATLAB for file parsing Simulation of open pipe (symmetry boundary condition) and obtained the results How parameter changes with respect to change in angles. Analytical solution Changes between wedge boundary…

Assignment Name- Simulation of a backward facing step in OpenFOAM Objective familiar mesh procedure by using the Open FOAM Simulate the flow without using any grading factor (i.e., GF = 1)  Simulate the flow with grading factor of 0.2. The cells should be finer near the walls (includig the step wall) Mesh Specifications:…

Assignment name-  Simulation of Flow through a pipe in Open Foam   Objective- To developed a program in MATLAB for file parsing Simulation of open pipe (wedge boundary condition) and obtained the results Some assumption and formula required for these assignments Hydrodynamic entrance length- it is distance of…

Aim-Solving steady and Unsteady 2D heat conduction Problem Given data- Top Boundary = 600 K Bottom Boundary = 900 K Left Boundary = 400 K Right Boundary = 800 K You will implement the following methods for solving implicit equations. Jacobi Gauss-seidel Successive over-relaxation Your absolute error criteria is 1e-4 (tolerance)…

                       Assignment name- MacCormack method Aim-1-D Supersonic nozzle flow using MacCormack’s method Objective- 1. Steady-state distribution of primitive variables inside the nozzle2. Time-wise variation of the primitive variables3. Variation…

                                              Assignment name-literature review of finite volume method   1.What is finite volume method- FVM is computational discretization method and it is used in CFD…

Assignment Name-Deriving 4th order approximation of a 2nd order derivative using Taylor table method     Aim- Deriving 4th order approximation of a 2nd order derivative using Taylor table method   Objective-Deriving second order derivative by analytically and compare with three numerical approximation that…