Rayleigh Taylor Instability Challenge

              Ahmed Body Challenge  SOLUTION1: Ahmed body:- The Ahmed body was originally described By S.R. Ahmed in 1984. Ahmed body is a simplified car body. The shape provides a  model to study geometric effects on the wakes of the ground vehicles. They are a kind of baseline…

Step 1: Select the Single cyl DI tutorial. Step 2: Make the discretization length as a parameter. Case Setup: Here two cases are taken. One of which has discretization length as 40mm while the other has 0.1mm. Post-Processing: As we can see here, the difference in the result of both cases is not quite big. Brake Torque:…

Symmetry vs Wedge vs HP equation In the following project a script was written in matlab to generate the blockMeshDict file according to the wedge angle, diameter and length of a pipe using symmetry boundary condition. Simulation results obtained for 10,25 and 45 degree angle (symmetry boundary condition) are compared…

Objective To explore FRM models and create a FRM model for a given engine configuration using FRM builder approach   FRM-(Fast Running Model)   A FRM model is a fully physical engine model that is designed specifically to run fast. When simulation speed is of priority, high-fidelity GT-POWER engine models…

Types of the turbocharger:  Single Turbo Sequential turbo Twin scroll Turbo Variable geometry turbo Variable twin scroll turbo Electric turbo TURBOCHARGER EXAMPLE IN GT POWER: The following are the examples from the gt-power: Fixed geometry turbocharger: this is the simplest form of the turbocharger in which the geometry…

Assignment 4:Tutorial No 1- CI final Introduction:- A model of compression ignition engine running at 1800rpm is given below:- Air is allowed to enter through the inlet and moves along the runners to meet at the throttle and then allowed to enter the cylinder. Fuel is injected directly into the cylinder for combustion…

Explore Tutorial No 1- SI final Introduction:- A spark ignition IC engine model take for my case study is single cylinder model. It is port injected and fuel and air enters in to the combustion chamber as homogenious mixture. This model of our engine runs at 1800 rpm and the key parameters are noted down. Engine performance…

We have to solve the one dimention convection equation and plot the  data by comparing the velocities at different number of grid points. the 1D convection equation is given below `(du)/(dt)+c*(du)/(dx)=0` On discritizing using forward differencing for time derivative(time marching) and backward differencing for space…

  Assignment 1: Understanding GT Power   1. Introduction:- GT Suite is multiphysics CAE system simulation software. The foundation of GT suite is a versatile multi-physics plateform for constructing models of general systems based on many underlying fundamental libraries: Flow library (Any fluid, liquid, gas…

Gearbox Sloshing effect The objective is to perform gear sloshing simulation on ansys fluent for two different gearboxes with different clearance. The User defined function is used which provides the angular velocity of 200rpm. Four simulations were performed:- Case 1 Gearbox : Air and water Case 2 Gearbox : Air and Oil…

  Challenge on Combustion Objective:- Perform a combustion simulation on the combuster model and plot the variation of the mass fraction of the different species in the simulation using line probes at different locations of the combuster. You need to plot for CO2,H2O,CH4,N2,O2 and NOx emissions.   Introduction:-…

  Cyclone Separator Challenge   Objective:- We have to perform an analysis on the cyclone seperator model for  different number of inectioned particles. 1. The four imperical models used for cuclone seperator efficiency:- CYCLONE SEPERATOR:- Cyclone seperators provides a method of removing the particulate…

  Gate Valve Parametric Study A gate valve, also known as a sluice valve, is a valve that opens by lifting a barrier(gate) out of the path of the fluid.Gate valves are used to shut off the flow of liquids rather than for flow regulation. Gate valve require very little space along the pipe axis and hardly restrict…

Conjugate Heat Transfer Analysis on a graphics card. Description of a conjugate heat transfer analysis:- Conjugate heat transfer represents the combination of heat transfer in liquids and solids simulteneously. The mode of heat transfer in solids is conduction and convective mode of heat transfer is found predominately…

    Rayleigh Taylor Instability Challenge SOLUTION-1:- Models used for Rayleigh-Taylor instability:- Early-time growth Potential flow Buoyancy-drag balance Energy budget   1. Early-time growth:- It was noted in the taylor (1950) that two superimposed fluids with an interface the noramal to acceleration field…

              Exhaust Port Challenge SOLUTION1:- Why and Where a CHT analysis is used? Conjugate Heat Transfer analysis:- Conjugate heat transfer analysis is generally used when there is a teperature variation during heating and cooling in the material due to interaction between solid…

    Simulation of Flow through a pipe in                                OpenFoam Objective of the project:- 1. Calculation of flow variables. 2. Generation of the blockMeshDict using the wedge boundary condition. create the blockMeshDict…

Simulation of a 1D Super-sonic nozzle flow simulation using Macormack Method Introduction:- nozzles are most commonly used in every fields in order to study the liquids and air properties, because those two elements plays an important role in the enginnering fields. However we have many properties and the beheaviour of…

             FVM:: Interpolation and Gradient Schemes literature review FVM-Flux limiters and interpolation schemes What is FVM? FVM is a finite volume method for representing and evaluating PDE\'s in the form of algebraic equations which are similar to the FDM or FEM. Values are calculate…

      BlockMesh Drill down challenge Objective:- The objective of this study is to make a backward facing step block by editing the blockMeshDict file and simulate it in openFoam and post process the results like velocity profile near the time step zone and to check the effect of grading scheme on velocity…

Steady state solution:-  We make the assumption as there is no heat convection, no internal heat generation, and no change of itemerature gradient with resect to time. therefore the generalised heat equation in 2D becomes as:- `(del^2T)/(delx^2)+(del^2T)/(dely^2)` Solving the steady state equation does not tinvolve…

Taylor’s table method is used to derive the fourth order accurate approximation of second order derivative of a function, for three different scheme (Central difference scheme, skewed right sided difference scheme, skewed left sided difference scheme).   4th order approximation of second order derivative Central…

The code to plot the first order ,second order ,fourth order error for a range of dx and also to check the slope of each curve is as given below:-   clear all close all clc x = pi/3; dx = linspace(pi/4,pi/400000,200); for i= 1:length(dx) first_order_error(i) = first_order_approximations(x,dx(i)); second_order_error(i)=…

A pendulum of mass m and length L is iniatially at theta=0 rad and is given the angular velocity 3 rad/sec. and for given situation damping coefficient is given as 0.05 . This motion is simulated using the matlab code in between the time gap of 0-20sec. The ODE represents the equation of motion `(d^2theta)/dt^2 +(b/m)*((d…