Week 3: Flow over a backward facing step

AIM: To do a pre-processing on a given Suspension assembly model using ANSA. OBJECTIVE: To check the geometrical error on the given model. To generate 2D mesh on the components based on the quality criteria given. To generate volume mesh on the component using tetra elements. To make connections in the given model. PROCEDURE:…

AIM: To do a pre-processing on a given model using ANSA. OBJECTIVE: To check the geometrical error on the given models. To extract a mid-surface of the given models. To generate 2D mesh on the components based on the quality criteria given. Assigning thickness to the components. PROCEDURE: IMPORTING THE CAD MODEL: The…

AIM: To perform morphing operation on the given models to achieve the required shape. INTRODUCTION: MORPHING: Morphing is an adaption of given shape to a new form. The geometry of a given model can be modified to required shapes to create new designs. The functions of the Morphing menu can be used to efficiently re-shape…

AIM: For the given rear door FE model, create and apply different PIDs for different components and perform suitable connections. OBJECTIVE: To connect the different components in the rear door FE model with suitable connections. PROCEDURE: IMPORTING THE CAD MODEL: The CAD model is imported into the workspace by using…

AIM: To do a pre-processing on a given Rearview mirror component model using ANSA. OBJECTIVE: To check the geometrical error on the Rearview mirror model. To generate 2D mesh on the components based on the quality criteria given. To generate volume mesh on the component using tetra elements. PROCEDURE: IMPORTING THE CAD…

AIM: To do a pre-processing on a given Rearview mirror component model using ANSA. OBJECTIVE: To check the geometrical error on the Rearview mirror model. To generate 2D mesh on the components based on the quality criteria given. To generate volume mesh on the component using tetra elements. PROCEDURE: IMPORTING THE CAD…

AIM: To do a pre-processing on a given models using ANSA. OBJECTIVE: To check the geometrical error on the given models. To extract a mid-surface of the given models. To generate 2D mesh on the components based on the quality criteria given. Assigning thickness to the components. MODEL 1: PROCEDURE: IMPORTING THE CAD MODEL:…

AIM: To do a pre-processing on a given bottle cap model using ANSA. OBJECTIVE: To check the geometrical error on the Bottle cap model. To extract a mid-surface of the Bottle cap model. To generate 2D mesh on the components based on the quality criteria given. Assigning thickness to the components. PROCEDURE: IMPORTING…

AIM: To do a pre-processing on a given hood model using ANSA. OBJECTIVE: To check the geometrical error on the hood model. To extract a mid-surface on the components such as inner extract, outer extract, latch reinforcement extract and two hinge reinforcement extracts. To generate 2D mesh on the components based on the…

AIM: PART 1: To perform a combustion simulation on the combustor model and plot the variation of the mass fraction of the different species in the simulation. PART 2: Adding water content in the fuel and observe the effect of the results. INTRODUCTION: Combustion is a high-temperature exothermic redox chemical reaction…

AIM: To perform a parametric study on the gate valve simulation by setting the valve lift from 10 to 80%. OBJECTIVE: To obtain the mass flow rates at the outlet for each design point. To calculate the flow coefficient and flow factor for each opening and plot the graph Discuss the results of the mass flow rate and flow…

AIM: To perform an analysis on cyclone separator and calculate the separation efficiency and pressure drop. OBJECTIVE: To write a few words about any four empirical models used to calculate the cyclone separator efficiency.  To perform an analysis on a given cyclone separator model by varying the particle diameter…

AIM: To perform a steady state conjugate heat transfer analysis on graphics card. OBJECTIVE: To run the simulation at three different velocity of air. To identify the potential hotspot in the graphics card. INTRODUCTION: GRAPHICS CARD: A graphics card is an expansion card which generates a feed of output images to a display…

AIM: Simulate and study the Rayleigh Taylor instability using volume of fluid method. OBJECTIVE: To study the importance of Rayleigh Taylor instability. To study multiphase flow in Ansys fluent. To study the volume of fluid method and its importance. To study the effect of mesh refinement on the Rayleigh Taylor instability…

AIM: To develop a numerical setup for conjugate heat transfer analysis on exhaust port. OBJECTIVE: Give a brief description of why and where a CHT analysis is used Maintain the y+ value according to the turbulence model and justify the results. Calculate the wall/surface heat transfer coefficient on the internal solid…

AIM: To do a external flow simulation over an Ahmed body OBJECTIVE: Q1. Describe Ahmed's body and its importance. Q2. Explain the reason for the negative pressure in the wake region.  Q3. Explain the significance of the point of separation.  EXPECTED RESULTS: Velocity and pressure contours.  The drag coefficient…

AIM: To simulate the flow over a cylinder and explain the phenomenon of karman vortex street. PART-I Simulate the flow with the steady and unsteady case and calculate the Strouhal Number for Re= 100.  PART-II Calculate the coefficient of drag and lift over a cylinder by setting the Reynolds number to 10,100,1000,10000…

OBJECTIVE: For this challenge, we have created two versions of the mixing tee. One of them is longer than the other. Our job is to set up steady-state simulations to compare the mixing effectiveness when hot inlet temperature is 360C & the Cold inlet is at 190C.  Use the k-epsilon and k-omega SST model for the first case…

AIM: Tutorial- single cyl DI add case 2 with discretization length 0.1 mm for intake runner and compare with default case 1 Parameters-Torque, BSFC, max cylinder pressure simulation time Explore tutorial no 2 (GEM3D) - “Building intake manifold from STL model”  INTRODUCTION: Discretization is the…

AIM: Explore tutorial number 9 and write a detailed report Build FRM Model for following configuration using FRM builder approach Bore 102 mm stroke 115 mm CR 17 No of cylinder 6 CI engine Twin Scroll Turbine GT Controller Run all cases INTRODUCTION: FAST RUNNING MODEL: Fast Running Engine Models are dynamic, fully-physical…

AIM: List down different TC and locate examples from GT Power Explore tutorial number 6 and 7 Plot operating points on compressor and turbine maps In which application Variable Geometry Turbine is beneficial? Explore example- Diesel VGT EGR and understand the modelling part SOLUTION: 1. LIST DOWN DIFFERENT TC AND LOCATE…

AIM:                Basic calibration of single cylinder CI-Engine. OBJECTIVE: Compare SI vs CI and list down the differences Comments on following parameters BSFC Exhaust Temperature A/F ratios Change MFB50 and observe impact on performance 1.COMPARISON BETWEEN SI AND CI ENGINE: SI ENGINE CI ENGINE Si engine uses a spark…

AIM : To run the single cylinder SI engine setup at 1800 rpm and list down parameters such as air flow rate, BSFC, BMEP, In cylinder pressure. To run the same setup at 3600 rpm and to increase the output by 10% INTRODUCTION: A spark-ignition engine (SI engine) is an internal combustion engine, generally…

1. Explore the GUI of GT SUITE and list down modules available with brief description.  GT-SUITE: GT-SUITE is the simulation tool with capabilities and libraries aimed at wide variety of applications and industries. It offers engineers functionalities ranging from fast concept design to detailed system or sub-system…

AIM:          To do a full hydrodynamic simulation of port fuel injection and post process the results. OBJECTIVE: Import the CAD model of IC engine into converge and run diagnosis. Setup the case for hydrodynamic simulation and to create animation in paraview. INTRODUCTION: GEOMETRY SETUP: IMPORT…

PORT FUEL INJECTION: 1. What is the Compression ratio for the engine?      The compression ratio is the ratio between the volume of the cylinder and combustion chamber in an internal combustion engine at their maximum and minimum values.      In a piston engine, the static…

AIM:         To simulate a 600 Sector geometry of a CAT-3410 diesel engine with different piston bowl profiles and to understand the effect of piston bowl geometry on performance and emisson characteristics of the engine.  INTRODUCTION: The geometries are created using the “make engine sector…

AIM:          Surface preparation and boundary flagging. OBJECTIVE: Import the CAD model of ic engine into converge and run diagnosis. Setup the case for no hydrodynamic simulation and to create animation in paraview. INTRODUCTION: GEOMETRY SETUP: IMPORT GEOMETRY:      …

AIM:Derive the Reynolds Averaged Navier Stokes Equation and find an expression for Reynolds stress.Understand the terms Reynolds stress, Turbulent viscosity and Molecular viscosity.INTRODUCTION AND THEORY:The Reynolds-averaged Navier–Stokes equations (or RANS equations) are time-averaged equations of motion for fluid flows.…

AIM:                To do a transient state simulation of a shock tube. OBJECTIVES: To setup a transient state shock tube simulation. To plot the pressure and temperature plot history in the entire domain To plot the cell count as a function of time. To show the mesh generation using PARAVIEW. INTRODUCTION: The shock tube is…

AIM: To simulate a flow through a pipe with air as the flow fluid and post process the results.  OBJECTIVE: grid dependency test y+ Effect of supercycling INTRODUCTION AND THEORY: "Heat transfer" is known as the flow of thermal energy from one region to another region occupied by any matter (solids and fluids) where…

AIM:             To simulate the Prandtl Meyer Shock flow in converge CFD. OBJECTIVE: To simulate the supersonic and subsonic flow through a duct. To observe the effect of SGS on shock location. To study the formation of shock waves in the duct. THEORY: SHOCK WAVE: shock is a type of propagating disturbance that moves…

AIM:         Transient simulation of flow over a throttle body. OBJECTIVE: To set up and run the transient state simulation for flow over the throttle body. To plot pressure contour and velocity contour. To show the mesh, plots for pressure, velocity, mass flow rate and total cell count. To create an…

AIM: Steady state simulation of flow over a throttle body. OBJECTIVE: To set up and run the steady state simulation for flow over the throttle body. To plot pressure contour and velocity contour. To show the mesh, plots for pressure, velocity, mass flow rate and total cell count. To create an animation in which throttle…

AIM: To simulate the flow of air through a backward facing step using converge CFD. OBJECTIVE: To setup and run the simulation for three different grid sizes and compare the results. To plot velocity contour, pressure contour, mass flow rate and total cell count for all the 3 base mesh sizes. INTRODUCTION: BACKWARD FACING…

AIM: To simulate the flow of air through a channel using converge CFD. OBJECTIVE: To setup and run the simulation for three different grid sizes and compare the results. To plot velocity contour, pressure contour, mass flow rate and total cell count for all the 3 base mesh sizes. INTRODUCTION: CHANNEL FLOW: Flows in conduits…

AIM:                Sensitivity analysis of grimech 3.0. OBJECTIVE: To write a code that takes all the reactions from the GRI mechanism and calculates 10 most sensitive reactions To plot a graph of sensitivities vs the reactions. THEORY: SENSITIVITY: Sensitivity analysis is a process to get relationship between the parameters…

AIM:                To study the auto-ignition using cantera. OBJECTIVE: To simulate the Auto Ignition Time for Methane under the following conditions, (simulation time = 10 secs) Plot the variation of Auto Ignition time of Methane with a constant temperature of 1250K and pressure varying from 1 to 5 atm. Plot the variation…

AIM:        To solve the system of ODE using Newton Raphson method. GIVEN: `(dy_1)/dt= -0.04y_1+10^4 y_2 y_3` `(dy_2)/dt=0.04y_1-10^4 y_2 y_3- 3.10^7 y_2^2` `(dy_3)/dt=3.10^7 y_2^2` Since the given ODEs are stiff ODE, the implicit method is used to solve stiff ODE. The backward differentiation is used to solve the ODE…

AIM: Analysis of the stability of ODE solvers THEORY: Ordinary differential equation (ODE) is a differential equation containing one or more functions of one independent variable and the derivatives of those functions. ODE can be solved using numerical methods. In solving engineering problems, the system of ODE can be…

AIM:         To derive the reaction rate ODEs of a simple reaction mechanism by using compact notation and to write down the desired matrices. REACTION MECHANISM: `CO + O2 ⇌ CO2 + O` `O + H2o ⇌ OH + OH` `CO + OH ⇌ CO2 + H` `H + O2 ⇌ OH + O` DERIVATION TO FIND RATE OF CHANGE OF CONCENTRATION: RATE…

AIM: To find the effect of preheating on the adiabatic flame temperature. To plot the effect of preheat temperature on combustion efficiency. THEORY: A recuperator is a special purpose counter flow energy recovery heat exchanger positioned within the supply and exhaust air streams of an air handling system, or…

AIM: To write a python code to vary the temperature of air and oxidizer individually. 1.Use the "moles" method/function of the A object and explain how it was calculated. The object A is air. The fuel air reaction considered is given below                      CH4 + 2*(O2 +3.76N2) = CO2 + 2H20 + 7.52N2 The mole fraction…

AIM: To calculate adiabatic flame temperature, Adiabatic flame temperature variation with Equivalence ratio (In constant volume-chamber) Adiabatic flame temperature variation with Heat loss (In constant pressure-chamber) Adiabatic flame temperature variation with respect to Alkane, Alkene, Alkyne Adiabatic flame temperature…

AIM: To write a program in matlab that can generate the mesh automatically for any wedge angle, diameter and length of pipe. To validate maximum velocity and pressure drop for fully developed flow. To post process shear stress for fully developed flow. HAGEN-POISEUILLE EQUATION: Hagen Poiseuille equation is a physical…

AIM: To write a program in matlab that can generate the mesh automatically for any wedge angle, diameter and length of pipe. To validate maximum velocity and pressure drop for fully developed flow. To post process shear stress for fully developed flow. HAGEN-POISEUILLE EQUATION: Hagen Poiseuille equation is a physical…

AIM: To define finite volume method To write down the difference between FDM and FVM. To describe the need for interpolation schemes and the flux limiters in FVM. FINITE VOLUME METHOD: The finite volume method (FVM) is a method for representing and evaluating partial differential equations in the form of algebraic equations. In…

AIM:    To simulate an incompressible – laminar – viscous flow through the backward facing step geometry.    To measure the velocity profile at 0.085 m from inlet of the geometry. GIVEN: CASE 1 - Simulate the flow without using any grading factor (i.e., GF = 1) CASE 2 - Simulate the flow with grading factor of 0.2. The…

OBJECTIVE: To write a matlab program for the quasi 1D supersonic nozzle flow simulation for both conservative and non conservative form of governing equation using maccormack method. To compare the result obtained by conservative and non conservative form of governing equation. To perform a grid dependence test on the…

AIM:       To write a code to Solve the 2D heat conduction equation by using the point iterative techniques such as Jacobi Gauss-seidel Successive over-relaxation (SOR) ASSUMPTIONS: The domain is a unit square. Number of points in x direction is equal to number of points along y direction. Boundary condition for steady…

AIM:                To derive the fourth order approximations of a second order derivative using central differencing scheme, skewed right sided difference and skewed left sided difference with the help of taylor table method and to compare the analytical…

AIM: To simulate a rankine cycle using MATLAB. To plot T-S and H-S diagram of rankine cycle. To find net work output and back work ratio for the given inputs. THEORY:          The Rankine cycle is a model used to predict the performance of steam turbine systems. It was also used to study the performance of reciprocating…

AIM: To write a function that extracts the 14 co-efficients and calculates the enthalpy, entropy, specific heats for all the species in the data file. To calculate the molecular weight of each species and display it in the command window. To plot the cp, enthalpy and entropy for the local temperature range specific for…

AIM:           To write a code in MATLAB to optimise the stalagmite function and find the global maxima of the function. EXPLANATION: GENETIC ALGORITHM: A genetic algorithm (GA) is a method for solving both constrained and unconstrained optimization problems based on a natural selection process that mimics biological evolution.…

 AIM:            To write a code for creating a animation of simple pendulum using matlab. EXPLANATION: SIMPLE PENDULUM:            A pendulum is a weight suspended from a pivot so that it can swing freely. When…