Week 5 - Turbulence modelling challenge

AIM The aim of this challenge is to simulate the hybrid vehicle model OBJECTIVES Simulation run of hybrid vehicle Increase the Vehicle mass by 50%. Increase the Drag coefficient by 5%. Comparison of the results HYBRID ELECTRIC VEHICLES A hybrid vehicle is one that uses two or more distinct types of power, such…

AIM The aim is to simulate the Aerodynamics Behaviour of FSAE Car  OBJECTIVE ABCD Racing company is looking to perform Aero Simulations for their FSAE vehicle and they have hired you to do the job. The suspension team wants a detailed report on the total downforce on individual components. They have two races in this…

AIM The aim of this validation project is to simulate and validate the flow over an Ahmed Body OBJECTIVES Creating the CAD file for the Ahmed body Making of virtual wind tunnel for the car Simulating the case and validation of results with experimental values   AHMED BODY The Ahmed body was described originally by…

AIM The aim of this project is to simulate the flow over a NACA 2412 Airfoil OBJECTIVES Plot Coefficient of drag vs angle of attack Plot Lift Coefficient vs angle of attack Comparison of turbulence model results AIRFOIL An airfoil (American English) or aerofoil (British English) is the cross-sectional shape…

AIM This simulation aims to model computational acoustics in Ahmed body OBJECTIVES Setup the domain and setup assuming body is traveling at 110 kmph Run the setup till convergence and plot for static pressure and coefficient of drag and lift to check for convergence Turn on Broadband- modeling and detail the acoustic field…

AIM The aim of this project is to simulate the flow through a winkl hoeffer nozzle OBJECTIVES Different pressure difference conditions Pressure difference vs cavitation zone length plot   Cavitation is a phenomenon in which the reduction of pressure to or below the liquid's vapour pressure leads…

AIM The aim of this project is to simulate the turbocharger flow analysis OBJECTIVES Pressure ratios of different conditions Speed of impeller FSI model for turbocharger TURBOCHARGER A turbocharger, colloquially known as a turbo, is a turbine-driven, forced induction device that increases an internal…

AIM The aim of this simulation is to capture flow characteristics of proportional valve OBJECTIVES Variation of lift of valve Comparison of results with and without AMR FSI model integration with transient case solver PROPORTIOAL VALVE The valve body of a safety relief valve is typically designed with an angle of 90 between…

AIM The aim is to simulate the flow of air inside the supercharger OBJECTIVES Performance data of supercharger Obtainning the plot of total pressure v/s mass flow rate providing different pressure ratios as boundary conditions Conservation of mass of air from supercharger   SUPERCHARGER A supercharger is…

NACA 0012 AIRFOIL The NACA airfoils are airfoil shapes for aircraft wings developed by the National Advisory Committee for Aeronautics (NACA). The shape of the NACA airfoils is described using a series of digits following the word "NACA". The parameters in the numerical code can…

TURBULENCE MODELS FOR CFD APPLICATIONS DNS MODEL A direct numerical simulation (DNS) is a simulation in computational fluid dynamics (CFD) in which the Navier–Stokes equations are numerically solved without any turbulence model. This means that the whole range of spatial and temporal scales…

    A pitot tube, also known as a pitot probe, is a flow measurement device used to measure fluid flow velocity. The pitot tube was invented by the French engineer Henri Pitot in the early 18th century and was modified to its modern form in the mid-19th…

AIM  The aim of this project is to simulate the flow of liquid inside a centrifugal pump OBJECTIVES Running the simulation with various mass flow rates at outlet Increase in outflow distance by twice the impeller diameter  Performance plot Efficiency of  pump CENTRIFUGAL PUMP A centrifugal pump is…

AIM The aim is to simulate the no hydrodynamic case of port fuel injected engine OBJECTIVES Full simulation of working IC Engine PORT FUEL INJECTED ENGINE Port Fuel injection is when fuel (either gasoline or diesel fuels) is injected prior to the valve and cylinder, where the combustion happens. Back in the early 1900s,…

AIM  The aim is to conduct a literature review of Reynolds Average Navier Stokes[RANS] OBJECTIVES Derivation of RANS equations Performing Reynolds decomposition for engineering flow parameters REYNOLDS AVERAGED NAVIER STOKES EQUATION The Reynolds-averaged Navier–Stokes equations (or RANS equations)…

AIM The aim of this project is to simulate the shock waves flow in shock tube OBJECTIVES Some of the objectives are listed as follows Transient setup for shock tube  Plot of temperature and pressure  Visualisation of the shock wave propagation SHOCK TUBE The shock tube is an instrument used to replicate…

AIM  The aim of this simulation is to analyse the conjugate heat transfer through a cylinder OBJECTIVES Flow simulation through pipe with conjugate heat transfer  Turbulent flow with high Reynolds number Super cycle model needs to be implemented CONJUGATE HEAT TRANSFER The term conjugate heat transfer (CHT) is…

AIM  The aim of the simulation is to study the Prandtyl Meyer Shock Flow OBJECTIVES Boundary conditions for shock flow Analysis of shock wave in physics Effect of sub-grid scale on temperature SHOCK WAVE In physics, a shock wave, or shock, is a type of propagating disturbance that moves faster than the local speed…

AIM The aim is to simulate the transcient flow over the throttle body within the elbow OBJECTIVES Transcient simulation of the throttle body post process of the flow parameters THROTTLE BODY In fuel injected engines, the throttle body is the part of the air intake system that controls the…

AIM The aim of this challenge is to simulate the flow over a throttle body inside an elbow OBJECTIVES Simulation of flow over a throttle body Post processing of the results for flow variables THROTTLE BODY In fuel injected engines, the throttle body is the part of the air intake system that…

AIM The aim is to Simulate the flow of air over Backward facing step OBJECTIVES The case should be run with 3 different mesh sizes Post processing of the flow parameters BACKWARD FACING STEP Backward-Facing Step (BFS) flow is one representative separation flow model, which is of significance in both theoretical and engineering…

AIM The aim is to simulate the flow inside a rectangular channel OBJECTIVES Simulation has to be run for 3 different cases varying the mesh  Contour plots of parameters  Comaparision of results in paraview and Converge post   PIPE FLOW Pipe flow, a branch of hydraulics and fluid mechanics,…

AIM The aim of this project is to analyse the reduction in reaction mechanism of GRI Mech 3.0 OBJECIVES Program to run a reference Ignition delay and Max temperature Analysis for the unreduced mechanism for a set of state values Sensitivity analysis with respect to temperature must be run on all the reactions in the mechanism…

AIM  The aim of this program is to perform sensitivity analysis on GRI file mechanism OBJECTIVES Program that takes all the reactions from the GRI mechanism and calculates 10 most sensitive reactions The sensitivity parameter should be with respect to the Temperature   SENSITIVITY ANALYSIS Sensitivity analysis is…

AIM The aim of this challenge is to simulate the auto ignition temperature for methane OBJECTIVES Variation of Auto Ignition time of Methane with a constant temperature of 1250K and pressure varying from 1 to 5 atm. Variation of Auto Ignition time of Methane with a constant pressure of 5 atm and temperature varying…

AIM The aim of this project is to solve the system of ODE using Newton Raphson Method   MULTIVARIATE NEWTON RAPHSON SOLVER Now lets discretise the equations which are being shown  `(y_1^(t) - y_1^(t-Delta t))/(Delta t) = -0.004 y_1^t + 10^4 y_2^t y_3^` Rearranging the terms, `y_1^(t) = y_1^(t-Delta t) + Delta…

AIM The aim is to conduct a literature review on stability of ODE    STABILITY OF ODE  In mathematics, stability theory addresses the stability of solutions of ODE and of trajectories of dynamical systems under small perturbations of initial conditions. The heat equation, for example, is a stable…

AIM  The aim is to derive reaction rate ODE of a simple reaction mechanism   DERIVATION OF REACTION RATE  Consider the following reactions, lets number the following reactions. CO + O2 -> CO2 + O (1) O + H2O -> OH + OH (2) CO + OH -> CO2 + H (3) H + O2 -> OH + O (4) And now lets list all the…

AIM The aim of this challenge is to study the effect of Pre heated air on combustion efficiency and Adiabatic Flame Temperature OBJECTIVES Effect of Preheating on adiabatic flame temperature Effect of preheating on Combustion efficiency Energy balance for Recuperator RECUPARATOR A recuperator is a special purpose…

AIM The aim of this challenge is to work on Quantity class in Cantera  OBJECTIVE The calculation of Adiabatic Flame Temperature of gas mixture using the Quantity class PYTHON CODE FOR CALCULATION OF MASS AND MOLE FRACTIONS OF AIR import cantera as ct gas = ct.Solution('gri30.cti') air = ct.Quantity(gas) air.TPX =…

AIM The aim of this project is to simulate the combustion of methane for calculation of Adiabatic Flame Temperature OBJECTIVES The main objectives are as follows Effect of equivalence ratio on AFT for methane Constant pressure process with heat loss parameter Testing the different fuels with 2 carbon atom bond   ADIABATIC…

AIM The aim of this project is to simulate the flow inside a Battery Thermal Management System OBJECTIVES The main objectives are as follows Excel Calculator for Volumetric heat generation source Run the case for different mesh sizes - 12,8,6 and 4 mm  Effect of element length on accuracy of results EXCEL CALCULATOR…

AIM The aim of this project is to discretise the 3D model into 1D GT Suite model OBJECTIVES The following objectives can be noted as Discretisation of Intake Manifold Effect of Discretisation length on simulation time DISCRETIZATION OF 3D MODEL OF INTAKE MANIFOLD In applied mathematics, discretization is the…

AIM The aim is to explore the Fast Running Model in GT-Suite OBJECTIVES Building an FRM using FRM approach Exploration and understanding of FRM   FAST RUNNING MODEL Fast Running Engine Models are dynamic, fully-physical engine models that are designed specifically to run fast. While high-fidelity engine models are…

AIM The aim is to analyse turbocharger modelling using GT-Suite OBJECTIVES The objectives of the challenge are Types of turbochargers and their models in GT-Suite  Variable Geometry Turbocharger applications Plotting of operating points on turbine and compressor map TURBOCHARGER A turbocharger is a turbine-driven,…

AIM The aim of this simulation is to run the engine case for maximum power and torque condition OBJECTIVES The main objectives of this simulation are Comparison of important engine parameters Post processing of simulation results SI ENGINE SIMULATION Thus for the case Study of an SI engine the following parameters are…

AIM The aim of this simulation is to explore the CI engine model OBJECTIVES  The objectives of the simulations are Comparison of SI & CI engine Performance parameters changes Effect of MFB 50 on engine performance COMPARISION OF SI AND CI ENGINE SI Engine CI Engine It works on OTTO Cycle or constant volume heat…

AIM The aim of the challenge is to run the simulation on SI Engine OBJECTIVES The objectives of this simulation are Running the simulation for engine speed of 1800 rpm Increase the power output by 10 % while engine is running at 3600 rpm  ENGINE PARAMETERS Air Flow Rate The air flow rate is defined as mass of air…

AIM The aim of this challenge is to explore through the graphics user interface of GT Power  OBJECTIVES  Location of settings for setting up of simulations in GT power Exploration of Intercooler tutorials  Setting up simulation of the intercooler GUI OF GT SUITE When we launch the GT Power software we can…

AIM The aim of this project is to modify blockmeshDict file for the given conditions OBJECTIVE  The main objective of this project is to simulate the flow over a backward step in OpenFoam and to compare the velocity plots for different mesh grading factors. BACKWARD FACING STEP Backward-Facing Step (BFS) flow is one…

AIM The aim of this challenge is to simulate the combustion process in a combustor OBJECTIVES The objectives of this simulation are Emission modelling for various reaction mechanisms Variation of mass fractions of different species for combustion model Effect of adding water content at the fuel inlet   COMBUSTION…

AIM The aim of this challenge is to simulate the flow through a gate valve  OBJECTIVES Parametric study for diifferent lifts of the gate valve Calculation of flow coefficient and flow factor for all lifts Obtaining mass flow rates of all hte cases   GATE VALVE A gate valve, also known as a sluice valve,…

AIM The aim of this project is to simulate the Discrete Phase Model on the Cyclone separator OBJECTIVES Cyclone separator efficiency study Simulate the cyclone separator by varying the particle diameter Simulate the cyclone separator by varying the particle velocity CYCLONE SEPERATOR Cyclone separators or simply cyclones are…

AIM The aim of this challenge is to simulate the Conjugate Heat transfer on graphics card OBJECTIVES The main objectives of this simulation is as follows Appropriate flagging of solid and fluid zones in the graphics card velocity should be varied for different cases. The maximum temperature and the heat transfer coefficient…

AIM The aim of this simulation is to simulate the Rayleigh Taylor Instability. OBJECTIVES The objectives are as follows The importance of Rayleigh Taylor Instability in CFD. Simulate the Rayleigh Taylor Instability with two different mesh sizes. Define an user defined fluid for this simulation Significance of Atwood number…

AIM  The aim of this challenge is to learn to solve ordinary differential equation in matlab. OBJECTIVE The main objective of this project is to write an program to solve the damped pendulum ordinary differential equation.   DAMPED PENDULUM A pendulum is a body which is suspended body in the form of a mass called…

AIM The aim of this project is to simulate the conjugate heat transfer simulation inside an exhaust manifold. OBJECTIVES The objectives of the simulation are Need of simulating Conjugate heat transfer on exhaust manifold Calculation of wall heat transfer coefficient on internal solid surface Maintaining appropriate y+…

AIM The aim of this challenge is to simulate the external flow over a ahmed body OBJECTIVES The main objectives of this challenge are Generation of the velocity and pressure contour plots for the flow over the ahmed body Significance of wake region and the point of separation in aerodynamics Drag coefficient plots to analyse…

AIM The main aim of this project is to simulate the flow over the cylinder OBJECTIVES The main objectives of the simulation are simulate the karman vortex street concept  running the simulation for steady and transient case of flow calculate the lift and drag coefficient    KARMAN VORTEX STREET In fluid…

AIM The aim of this project is to simulate the flow inside a mixing tee joint OBJECTIVES The objectives of this project is to simulate flow and study the mixing effectiveness   MIXING TEE JOINT Mixing tee are flow control devices in which they have two inlets, one for the hot fluid and the other one is for the cold…

AIM The aim of this project is to write a matlab program to automatically generate blockmeshDict file for any wedge angle and mesh grading factor OBJECTIVES The objectives of this project are Simulation of the laminar flow over a pipe post processing of velocity and shear stress profiles   LAMINAR FLOW THROUGH PIPE…

AIM The main objective of this project is to simulate the laminar flow over a pipe OBJECTIVES The objectives of the project are Writing a matlab code for creating blockmeshdict file for various wedge angles post process velocity and shear stress profiles for the wedge angles comparison between symmetry, wedge and Hagen…

AIM The aim of this project is to simulate one dimensional super-sonic flow using Macormack method OBJECTIVES The objectives of the project are to write a program to solve the conservative and the non-conservative form of equations perform a comparison study between the normalised mass flow rate of both the forms of equations…

AIM The aim of this project is to solve the 2 Dimensional equation using iterative solvers. OBJECTIVE  The main objective is to write an program to solve 2D steady and unsteady state equations by using following iterative solvers Jacobi Gauss Seidel Successive Over Relaxation   TWO DIMENSIONAL HEAT CONDUCTION…

AIM The main aim of this challenge is to write an program determine the second order derivative for the given function and compare results with different schemes OBJECTIVE The main objective of this challenge is to derive the fourth order approximation for second order function.   FOURTH ORDER APPROXIMATION FOR SECOND…