Numerical Discretization - Basics

Week 4 WOT Challenge II   1. What is the difference between mapped and dynamic model of engine, motor and generator? How can you change model type?  A.  (a) MAPPED DYNAMIC Mapped models show the bird's eye view of the model (Macro) using look up table. These models are used for understanding the behaviour…

Project-1: Powertrain for aircraft towing tractor with Electric Powertrain in runways   AIM:To study about the aircraft towing mechanism. To study the load, speed and motor operating conditions for the tractor. To design the electric drivetrain for estimated load requirements.   DESIGN PROCEDURE: Reverse Engineering…

Week - 4 - 2D meshing for Plastic components   AIM: For the given Plastic Bottle Cap model, check for the geometrical errors and take the mid surface by suitable mid surfacing techniques. PID and Thickness assignment has to be done for all the mid surfaces. Mesh the same with given element Quality criteria. (Refer…

Mid-Surface and Meshing of Car Hood:   AIM: For the given Hood model, Take the mid surface for all the components after checking the geometrical errors and mesh the mid surface with the given element Quality criteria. (Refer the table Below for the Quality criteria)    S.No  Quality Criteria  Value …

Washing Machine and Gear Shift Simulink Modelling   Implement control logic of a “washing machine” using Stateflow as per given sequence:  If the power supply is available, the system gets activated  If the Water supply is not available, stop the process & indicate through LED Soaking time…

SIMULINK BASIC MODELLING   1. Make a Simulink model of Doorbell using solenoid block with the following details:   In the above arrangement, when the switch is closed the electromagnet receives electrical power from the battery and pulls the metal arm to hit the bell producing sound.  Create a…

CFD SIMULATION OF COMBUSTOR MODEL TO ANALYZE EMISSIONS AND SOOT FORMATION   AIM: Perform a combustion simulation on the combustor model and plot the variation of the mass fraction of the different species’ in the simulation using line probes at different locations of the combustor as shown in Fig. You need to…

CFD SIMULATION OF CYCLONE SEPARATOR USING DISCRETE PHASE MODELLING   AIM: Perform a parametric study on the gate valve simulation by setting the opening from 10 % to 80%.  Obtain the mass flow rates at the outlet for each design point. Calculate the flow coefficient and flow factor for each opening and plot the…

CFD SIMULATION OF CYCLONE SEPARATOR USING DISCRETE PHASE MODELLING   AIM: To perform 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. …

GEARBOX SLOSHING EFFECT   AIM: Perform four simulations in the  Gearbox and then compare the results among all the four cases. 20% Immersion, Fluid - Engine oil. 30% Immersion, Fluid- Engine oil. 20% Immersion,Fluid-n-heptane (c7h16). 30% Immersion,Fluid-n-heptane (c7h16).   INTRODUCTION:   Q:What is…

CONJUGATE HEAT TRANSFER SIMULATION OF THERMAL MANAGEMENT SYSTEM IN A GRAPHIC CARD   AIM: Perform a steady-state conjugate heat transfer analysis on a model of a graphics card. You can use appropriate materials of your choice for the simulation. Make sure to properly define the correct solid and fluid zones. Refer…

FILE PARSING AND PLOTTING OF IC ENGINE SIMULATION DATA   AIM: Write a program in PYTHON to parse a thermodynamic file and plot the desired results. The program should automatically ask the user for column numbers, print and save the plots.     OBJECTIVES OF THE PROJECT: A set of commands were used to access…

CONJUGATE HEAT TRANSFER SIMULATION OF EXHAUST PORT   AIM: To run an ANSYS Fluent simulation on an IC Engine Exhaust port and observe the Conjugate Heat transfer results. Maintain the y+ value according to the turbulence model and justify the results. Calculate the wall/surface heat transfer coefficient on the internal…

CURVE FITTING USING PYTHON INBUILT FUNCTIONS   AIM: Write a code to fit a linear and cubic polynomial for the Cp Write a code to show split wise method for the same data.   GOVERNING EQUATIONS AND THEORY:  Curve Fitting is the principle used for formulation of a curve, closest to a dataset. The basic idea…

Rayleigh Taylor Instabiliy Challenge   AIM: Perform the Rayleigh Taylor instability simulation for 2 different mesh sizes with the base mesh being 0.5 mm. Compare the results by showing the animations( Attach them from your google drive). Observe the differences in the animation and explain the effect of mesh size…

BlockMesh Drill down simulation using OpenFoam   AIM: Run an incompressible transient flow blockmesh simulation on a drill down using OpenFoam.   OBJECTIVES OF THE PROJECT: Specify the boundary mesh and create the right meshing for the structure. Define the initial conditions for pressure and velocity of the…

Simulation of Flow through a pipe in OpenFoam   AIM: Write a program in MATLAB that can generate the computational mesh automatically for any wedge angle and grading schemes (wedge angle should be less than 5 degrees).  For a baseline mesh, show that the velocity profile matches with the Hagen poiseuille's…

Comparison between Boundary Conditions: Symmetry, Wedge and Hagen Poiseuille's equation   AIM: To write a code for the simulation of a laminar pipe flow and compare the results for Wedge Boundary Condition, Symmetry Boundary Condition and theoretical Hagen Poiseuille solution.    OBJECTIVES OF THE PROJECT:…

SIMULATION OF AHMED BODY   AIM: Run a simulation on Ahmed Body to visualize the flow dynamics Describe Ahmed's body and its importance. Explain the reason for the negative pressure in the wake region.  Explain the significance of the point of separation.    INTRODUCTION: Q:Describe Ahmed's body and…

STEADY VS UNSTEADY FLOW OVER A CYLINDER   AIM: Simulate the flow over a cylinder and explain the phenomenon of Karman vortex street. Simulate the flow with the steady and unsteady case and calculate the Strouhal Number for Re= 100.  Calculate the coefficient of drag and lift over a cylinder by setting the Reynolds…

MIXING EFFICIENCY:   AIM: To run a CFD Steady state simulation for a Tee Mixing problem for hot inlet velocity=`3 text( m/s)` and temperature= `36^0 C`, and cold inlet temperature= `19^0C`. The simulation is run for two case bodies of various lengths and two momentum ratio-2 and 4.   OBJECTIVES OF THE…

SIMULATION OF A 1D SUPER-SONIC NOZZLE FLOW USING MACORMACK METHOD   AIM: Simulate the isentropic flow through a quasi 1D subsonic-supersonic nozzle.  Derive both the conservation and non-conservation forms of the governing equations and sovle them using the MacCormack's technique. Determine the steady-state temperature…

UNDERSTANDING LINEAR SYSTEMS   AIM: Solve the system of matrices using Jacobi, Gauss-seidel and SOR methods. Compute the Iteration Matrix for the above mentioned methods by suitable matrix decomposition techniques taught in the lectures. Calculate the Eigen values of the Iteration matrix. Calculate the Spectral…

  AIM: Solve for the steady state and transient analysis of the 2D heat conduction equation. For each case, program a MATLAB code using Jacobi, Gauss Seidel and Successive Over Relaxation (SOR) method. Consider the cases of explicit and implicit solution for each sub-case and show results.   OBJECTIVES OF THE…

1D LINEAR CONVECTION   AIM: Write a MATLAB code to solve the 1D linear convection equation for time steps 0.0001,0.001,0.01 and 0.1s and constant number of grid points 80.   OBJECTIVES OF THE PROJECT: Solve the 1D linear convection equation for a first order forward differencing in time and first order backward…

1D LINEAR CONVECTION   AIM: Write a MATLAB code to solve the 1D linear convection equation for number of grid points 20,40,80,160.   OBJECTIVES OF THE PROJECT: Solve the 1D linear convection equation for a first order forward differencing in time and first order backward differencing in space. Reach the final…

TAYLOR TABLE METHOD   AIM: Derive a 4th Order approximation of the second order derivative for a central differencing scheme, Skewed left-sided difference and Skewed right-sided difference. Also prove that your skewed schemes are 4th Order accurate. Compare the absolute error plots for the above schemes…

DISCRETIZATION BASICS   AIM: Write a program that compares the first, second and fourth order approximations of the first derivative against the analytical or exact derivative.     OBJECTIVES OF THE PROJECT: To understand the theory and derivation of first, second and forth order numerical approximations…

OPTIMIZATION OF STALAGMITE FUNCTION USING GENETIC ALGORITHM   AIM: Optimize the stalagmite function and obtain the global maxima using MATLAB.   THEORY: Genetic Algorithms are an optimization technique used to solve non-linear or non-differentiable optimization problems. They use concepts from evolutionary biology…

FILE PARSING AND PLOTTING OF NASA THERMODYNAMIC DATA   AIM: Write a program in MATLAB to parse a NASA thermodynamic file and plot the calculated results. The program should automatically create a folder and save the plots according to compound, in the respective sub-folder.   GOVERNING EQUATIONS:  The following…

AIM: Program to simulate the transient behaviour of a simple pendulum. GOVERNING EQUATION and THEORY: A pendulum motion is a simple Sin curve rotated on the x-y plane. The pendulum motion is hindered because of the damping coefficient `b`. A transient equation is defined to understand the motion of the bob in a simple…

CURVE FITTING USING MATLAB INBUILT FUNCTIONS   AIM: Write a code to fit a linear and cubic polynomial for the Cp Write a code to show split wise method for the same data.   GOVERNING EQUATIONS AND THEORY:  Curve Fitting is the principle used for formulation of a curve, closest to a dataset. The basic idea…