Week 1: Channel flow simulation using CONVERGE CFD

AIM * To create a NACA 2412 airfoil using the coordinates available. * To run an external aerodynamics simulation for different angles of attack. * To plot the coefficient of lift and drag at different angles of attack. INTRODUCTION Lift and drag coefficients are of great importance when it comes to flight dynamics. Different…

AIM * To create a ahmed body model, along with the virtual wind tunnel and run a external aerodynamics simulation. * To post-process the result obtained from simulation and plot velocity along vertical direction at different points in the flow path. * To calculate the drag coefficient. INTRODUCTION Ahmed body is a geometry…

AIM * To derive Reynolds averaged navier stokes equation (RANS) by applying reynolds decomposition. * To explain the reynolds stress term. * To explain turbulent viscosity and how it is different from molecular viscosity. INTRODUCTION Reynolds averaged navier stokes equation is derived from the navier stokes…

AIM * To setup a transient shock tube simulaton. * To plot the temperature andd pressure history on entire domain. * To Plot the cell count as a function of time. INTRODUCTION A shock tube is a instrument used to replicate and direct blast wave to a sensor or a model in order to simulate actual explosion…

AIM * To simulate Conjugate heat transfer analysis through a pipe. * To run a grid dependence check. * To explain briefly about supercycling and to run the simulation for different supercycle stage interval for base grid and hence note the simulation time. INTRODUCTION Conjugate heat transfer (CHT) refers to heat transfer…

AIM * To explain what is a shock wave. * To explain different types of boundary conditions used in shock wave problems. * To explain effect of SGS on cell count and shock. INTRODUCTION Shock waves are type of propagating disturbances that move faster than the local speed of sound in the medium. Like an ordinary…

AIM * To run a transient simulation on a throttle body. * To show meshed surface, velocity and pressure contour. * To show plots for velocity, pressure and mass flow rate. * To show animation of fluid flow through throttle body. INTRODUCTION Flow of fluid through a throttle can be related to flow through a pipe only difference…

AIM * To run a steady state simulation of flow through a throttle body. * To show the meshed surface, velocity and pressure contour. * To show plots for velocity, pressure, mass flow rate, total cell count. INTRODUCTION Steady state simulation of flow through a throttle body can be related to flow through a pipe, only…

AIM* To Simulate flow through a backward facing step for different mesh size.* To identify recirculation region and hence obtain the velocity profile at that region.* To obtain different plots such as pressure contour, velocity contour, mass flow rate etc.INTRODUCTIONFlow separation taking place in an internal…

AIM * To simulate flow through a channel for different mesh size. * To obtain velocity contour and pressure contour. * To plot velocity, pressure, mass flow rate, cell count for all the simulated mesh size. INTRODUCTION Flow through channels can also be stated as flow through closed pipe, only difference being the…

AIM * To write code that takes all the reactions of GRI30 mechanism file and hence calculate 10 most sensitive reactions. * Sensitivity of the reactions are calculated with respect to temperature. INTRODUCTION If we consider any reaction, let us consider the stoichometric combustion of methane`CH_4 + 2(O_2+3.76N_2) = CO_2+2H_2O+7.52N_2`.…

AIM * To explore tutorial 9 which in details explains how to convert a existing model into a fast running model (FRM). * To build a FRM using FRM builder approach with     bore = 102 mm     Stroke = 115 mm     Compression ratio (CR) = 17     CI engine, Twin Scroll Turbine, GT controller…

AIM * To run simulation on single cylinder DI engine for 2 cases, first one with default case and second one with discretization length of 0.1 mm for intake runner and compare the result using parameters such as torque, bsfc, max cylinder pressure. * To explore tutorial number 2 and to build a intake manifold from STL…

AIM * To listdown different TC and locate examples from GT power. * To explore tutorial 6 and 7. * Plot operating points on compressor and turbine maps. * To explain in which application VGT turbine is beneficial. * To explore example-diesel VGT EGR and understand the modeling part. INTRODUCTION Since this assignment aims…

AIM * To run the simulation on single cylinder DI engine model and compare the results with single cylinder SI model. * To change the MFB 50 and note the changes in the performance. INTRODUCTION Single cylinder DI model is a diesel engine model it works on the principle of compression ignition. It consists of 4 stroke,…

AIM * Plot the variation of autoignition time of methane with a constant temperature of 1250 K and pressure varying from 1 to 5 atm. * Plot the variation of auto ignition time of methane with a constant pressure of 5 atm and temperature varying from 950 K to 1450 K. * Further observe and print the rate of change of molar…

AIM * To run the single cylinder SI engine case setup at 1800 rpm and to list down important parameters such as air flow rate, BSFC, BMEP, In cylinder pressure. * To run the same case setup at 3600 rpm and increase the output power by 10%. INTRODUCTION Single cylinder SI case setup is a tutorial available in the GT-suite,…

AIM * To solve given set of ode's using multivariate newton rhapson solver. INTRODUCTION It all starts with developing a good reaction mechanism. We know that combustion of fuel results in `CO_2, H_2O,N_2` and pollutants. The combustion reaction is not that straight forward, before the end products are formed there…

1. Different modules of GT-Power: * Mechanical - Includes simulation of kinematics, multi-body dynamics, frequency domain. * Electric and electromagnetic - Includes simulation of circuits, electromechanical devices. * Flow - Simulation of fluid, gas, liquid or mixture. * Acoustics  - Simulation of linear and…

AIM * To understand stability of ODE and its significance in engineering simulations. INTRODUCTION In the last challenge the rate of production of each species in the given reaction mechanism is computed the resulting formulation obtained is nothing but a matrix of ODE's as shown below. `[[omega_1],[omega_2],[omega_3],[omega_4],[omega_5],[omega_6],[omega_7]]…

AIM * To derive reaction rate ODE's for a given reaction mechanism using notations. INTRODUCTION To solve combustion using any CFD solver it is necessary that the solver should have a good reaction mechanism. Reaction mechanism is nothing but different reaction pathways, any fuel when undergoes combustion reaction generally…

AIM * To compute variation of Adiabatic flame temperature (AFT) with preheat temperature of reactant mixture in a furnace and to plot the same. * To compute variation of combustion efficiency of furnace with preheat temperature and plot the same. INTRODUCTION Furnace is basically a bolier or heater which can be used to…

* Codes to be considered: Q1. To start with given in line number 10 and line number 11: A.TPX = 298.15,ct.one_atm{'O2':0.21, 'N2':0.79} print(A.moles) Executing the above commands we get the output as follows, from the above  line number 10 it is understood that the mole fraction of O2 = 0.21       …

AIM * To run a transient simulation on a throttle body. * To show meshed surface, velocity and pressure contour. * To show plots for velocity, pressure and mass flow rate. * To show animation of fluid flow through throttle body. INTRODUCTION Flow of fluid through a throttle can be related to flow through a pipe only difference…

AIM * To run full hydro simulation on a PFI engine. * To generate different plots such as integrated heat release rate, volume, pressure, spary distribution etc. * To calculate compression ratio of the engine from volume plot. * To calculate combustion efficiency of the engine using the integrated heat release plot. *…

AIM * To run a steady state simulation of flow through a throttle body. * To show the meshed surface, velocity and pressure contour. * To show plots for velocity, pressure, mass flow rate, total cell count. INTRODUCTION Steady state simulation of flow through a throttle body can be related to flow through a pipe, only…

AIM * To perform a combustion simulation on the combustor model and plot the variation of mass fraction of different species in the combustion using line probes. * To perform combustion simulation by adding water from 5% to 30% in fuel and hence observe the changes in mass fraction of soot and `NO_x` in pollutatnts.…

AIM * To derive Reynolds averaged navier stokes equation (RANS) by applying reynolds decomposition. * To explain the reynolds stress term. * To explain turbulent viscosity and how it is different from molecular viscosity. INTRODUCTION Reynolds averaged navier stokes equation is derived from the navier stokes…

AIM * To setup a transient shock tube simulaton. * To plot the temperature andd pressure history on entire domain. * To Plot the cell count as a function of time. INTRODUCTION A shock tube is a instrument used to replicate and direct blast wave to a sensor or a model in order to simulate actual explosion and its effect.…

 AIM * To simulate Conjugate heat transfer analysis through a pipe. * To run a grid dependence check. * To explain briefly about supercycling and to run the simulation for different supercycle stage interval for base grid and hence note the simulation time. INTRODUCTION Conjugate heat transfer (CHT) refers to heat…

AIM * To write a program in python to plot the effect of equivalence ratio on Adiabatic flame temperature (AFT) of methane contained in a constant volume chamber assuming N2 is present. * To find out AFT of methane contained in a constant pressure chamber with `phi` = 1, `lamda` = 1 and H_loss = 0.35. * To find…

AIM * To explain what is a shock wave. * To explain different types of boundary conditions used in shock wave problems. * To explain effect of SGS on cell count and shock. INTRODUCTION Shock waves are type of propagating disturbances that move faster than the local speed of sound in the medium. Like an ordinary wave shock…

#AIM: * At a velocity of 3 m/s for both fluid and particle vary the particle diameter from 1 `mu m` to 5 `mum` and calculate the efficiency in each case. * To vary the fluid and particle velocity from 1 m/s to 5 m/s for a particle diameters of 5 `mum` and calculate efficiency and pressure drop in each case.…

 #AIM: * To run a steady state simulation on a model graphics card, with different choice of materials. * To run the simulation at 3 different velocity of air and hence compute max wall heat transfer coefficient and max temperature at processor. * To identify potential hotspot in the graphics card setup. #INTRODUCTION:…

#Aim: * To paramaterise the valve opening from 10% to 80%. * To calculate mass flow rates at different valve openings using parameters option in ansys workbench. * To calculate the flow coefficient and flow factor for different mass flow rates of different valve openings. #Introduction: Control valves are common mechanical…

# Aim: * To study and explain different mathematical models used to study Rayleigh taylor waves and how it is used in CFD calculations. * Define Atwood number, explain the effect of Atwood number on the instability. * Perform Rayleigh taylor instability analysis on interface of water and air. Run the simulation for baseline…

* This challenege is continuation of last challenege, were in flow through pipe is simulated using wedge boundary condition. Velocity profile as well as shear stress are plotted and the results are validated with Haigen poisuelli flow. In this challenge for same above problem instead of wedge boundary condition symmetry…

# AIM: * To define what is conjugate heat transfer (CHT) analysis and its purpose. * To do CHT analysis on exhaust manifold of a inline 4 cylinder engine. * To choose a right turbulence model and calculate inflation layer thickness using appropriate y+. * To calculate wall heat transfer coefficient and surface…

# Aim: * To run simulation of internal flow through a pipe. * To calculate hydrodynamic entry length, total length of pipe. * To plot velocity profile across the pipe at different locations along the direction of flow. * To plot shear stress. # Introduction: Internal flow through a cylindrical pipe is a common thing that…

# Aim of the project is to simulate a turbulent flow past a Ahmed body and hence calculate coefficient of drag and coefficient of lift. Also to understand flow separation and understand      how wake forms and how it affects the flow. also to perform grid independency test. # Introduction:  Ahmed body…

# Aim of the challenge as follows: 1. To run steady and unsteady state simulation for flow over a cylinder at Re = 100 and hence calculate the strouhal number. 2. Calculate the drag coefficient for flow over a cylinder (steady state) at different reynolds number and to study the effect of reynolds number on drag coefficient.…

# Aim of the project is to simulate flow through mixing tee's of 2 different length for different momentum ratio's and compare the mixing efficiencies. Mixing tee's are the ones which is commonly used in air conditioning systems. Usually a stream of hot air and stream of cold air (relativley less temperature than hot air)…

Finite volume method is the most commonly used discretization technique in computational fluid dynamics. It is on the basis of this discretization method most of the CFD tools are developed. To start with FVM in simple words we can say that, given domain is sub divided into many small domains or specifically many finite…

# Aim of the challenge is to simulate the flow through a backward facing step. The backward facing step used in this challenge is of following dimensions:            above single block is divided into 5 blocks as shown below. In 3d as follows along with the vertices.  above shown block…

# The aim of the project is to simulate the flow through a supersonic (1D) nozzle using MacCormack's method: * Supersonic nozzle: It is a convergent and divergent nozzle with a pinched section in the middle. It is mainly used in steam turbines and jet engines to accelarate a high pressurised gas to supersonic speed. Below…

The project includes solving 2d heat equation, both steady state and transient state using different iterative methods. Both steady state and transient state equations are solved using Gauss_jacobi, Gauss_siedel, SOR iterative methods, for transient state apart from these three methods it is also solved explicitly and…