Week 5 - Rayleigh Taylor Instability

AIM To create a detailed MATLAB model of an electric rickshaw (three wheel passenger vehicle).    OBJECTIVES Electric rickshaw model with following details, Rear wheels driven by PM brushed type motor. Assume efficiency points of motor controller and motor. To create an excel sheet with all input…

AIM To perform combustion simulation on the combustor model with methane as the fuel using ANSYS software.   INTRODUCTION The simulation of combustion is an useful method to analyze the combustion process and the particulate emissions caused by it. Using the CFD simulations , the amount of species emitted after combustion…

AIM To perform parametric study on gate valve simulation using ANSYS software.   OBJECTIVE To perform gate valve simulations by setting the opening from 10% to 80%. 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 then plot the…

AIM To perform simulations to analyse the cyclone separator and to calculate the separation efficiency & pressure drop using ANSYS software.   INTRODUCTION Cyclone separators are separation devices which uses centrifugal force generated by a spinning gas stream to separate particles from the carrier gas.…

AIM To perform steady state Conjugate Heat Transfer analysis on a model of a graphics card using ANSYS software.   OBJECTIVE To run the simulation by varying the inlet fluid velocity from 1m/sec to 5m/sec for at least three velocities. To find out the maximum temperature and heat transfer coefficient attained by the…

AIM To perform the Rayleigh Taylor Instability simulation and study the affects of Atwood number value on the behaviour of the instability using ANSYS Fluent.   INTRODUCTION Rayleigh Taylor Instability is one of the best example for hydrodynamic instability. This phenomenon was first introduced by Lord Rayleigh and later…

AIM To study the Conjugate Heat Transfer analysis method by performing four cylinder engine exhaust port simulation using ANSYS Fluent.   INTRODUCTION The interaction between conduction within a solid body and the convection from the solid surface to fluid moving over the solid surface is a common phenomenon…

  AIM To simulate external flow over an Ahmed body using ANSYS software. The simulation is run for the velocity of 25m/s with the default air properties in ANSYS Fluent software.   INTORDUCTION Aerodynamics of an automobile body is a crucial part in the designing process. Reducing the aerodynamics factors like…

AIM To simulate flow over a cylinder and study the phenomenon of Karman vortex street using ANSYS software.   INTORDUCTION Flow over cylinder is a very important problem in fluid mechanics because of its complex unsteady dynamics of the cylinder wake flow. The laminar vortex shedding , known as Karman Vortex Street…

AIM To set up steady-state simulations to compare the mixing effectiveness when hot inlet temperature is 36°C & the Cold inlet is at 19°C for a mixing tee problem using ANSYS software. The two cases to be simulated are as follows, Case 1:- Short mixing tee with a hot inlet velocity of 3m/s and momentum…

AIM To simulate an axi-symmetric flow by applying the wedge boundary condition and symmetry boundary condition using OpenFOAM software. Also highlight the differences in both boundary conditions in terms of their usage and application. The wedge angles at which simulation has to be done are 10°,25°…

AIM To simulate an axi-symmetric flow by applying the wedge boundary condition using OpenFOAM software. The conditions for the simulation is as follows, The flow is laminar and flows through a constant cross-section pipe at an inlet Reynold’s number of 2100. The simulation can be transient or steady state.…

Finite Volume Method (FVM) FVM is a discretization method for the approximation of partial differential equations based on the integral form of the conservation equations. In this method a finite volume is considered at each node. This volume defines a control volume. This control volume can be fixed in space or moving…

AIM To simulate an incompressible-laminar-viscous flow through the backward facing step geometry using OpenFOAM. Transient simulation should be performed. The mesh specification should be as follows, Number of cells along the x direction (longer dimension) = 200 Number of cells along the longer y…

AIM To simulate the isentropic flow through a quasi 1D subsonic-supersonic nozzle using both the conservation form and non-conservation forms of governing equations solved with MacCormack's technique.   GOVERNING EQUATIONS Integral form of the flow equations are as follows, Continuity equation , `del/(delt)intintintrho*dv+intintrhoV*dS=0`…

AIM  To perform the Steady state analysis & Transient State analysis on 2D heat conduction equation by using the point iterative techniques. The Boundary conditions for the problem are as follows; Top Boundary = 600 K Bottom Boundary = 900 K Left Boundary = 400 K Right Boundary = 800 K   THEORY Steady…

AIM A. Derive the following 4th order approximations of the second-order derivative, Central difference Skewed right-sided difference Skewed left-sided difference B. To write a program in Matlab to evaluate the second-order derivative of the analytical function `exp(x)*cos(x)` and compare it with the 3 numerical…

AIM To prepare a detailed battery pack drawing along with its enclosure and to state assumptions.   OBJECTIVES Battery pack design using A123 ANR26650M1-B type Li-ion cells and with battery pack capacity 18 kWh.   THEORY A battery pack is made up of any number cells which are arranged in series…

AIM 1)To simulate 3 test cases from harness dashboard in the MATLAB file given below and write a detailed report on the results. The MATLAB file, https://in.mathworks.com/matlabcentral/fileexchange/72865-design-and-test-lithium-ion-battery-management-algorithms   2)To define coulomb counting by referring to…

1) Prepare a table which includes materials & chemical reactions occurring at the anode and cathode of LCO, LMO, NCA, NMC, LFP and LTO type of lithium ion cells.Give your detailed explanation on it.   ANSWER The table showing the materials and chemical reactions in different types of Li-Ion batteries are…

AIM To create a MATLAB model of  an electric car which uses a battery and a DC motor, by choosing suitable blocks from Powertrain block set.   THEORY An electric car is a vehicle that is propelled by one or more electric motors, using energy stored in rechargeable battery packs. These are eco-friendly…

1)Search and list out the total weight of various types of aircrafts.  ANSWER In the below table we can see the weights of some of the biggest aircraft’s in the world, Aircraft Name MTOW (in tonnes) MLW (in tonnes) Antonov An-225 640.00 591.7 Airbus A380-800 575.00 394 Boeing 747-8F 447.70 346.091 Boeing 747-8…

1)ENERGY REQUIRED FOR BRAKING   AIM To calculate the energy required for braking ,for a defined driving cycle.   GOVERNING EQUATION To calculate energy , `E = 1/2m(v_f^2-v_i^2)` Where , `m` is the total mass , `v_f` is the final velocity ,`v_i` is the initial velocity. Here velocity…

1)Speed control of a DC motor using BJT H-bridge   AIM To run a MATLAB demo ‘Speed control of a DC motor using BJT H-bridge’ and then modify the model such that armature current doesn’t shoot up when motor changes direction from forward to reverse.    PROCEDURE This is the block diagram…

1)Which types of power converter circuits are employed in electric and hybrid electric vehicle?      ANSWER Some of the types of power converter circuits employed in electric and hybrid electric vehicles are as follows, DC to AC circuit :- This power converter circuit will convert the DC source…

QUESTION (1) What is the difference between mapped and dynamic model of engine, motor and generator? How can you change model type?  ANSWER Mapped model of engine :- This type of model represents macro engine behaviour as set of lookup tables as functions of commanded load and measured engine speed. These…

AIM To use the ADVISOR tool and simulate the following, 1)For EV_defaults_in file, if cargo mass is 500 kg with all other default conditions, can the vehicle travel for 45 km with FTP drive cycle?Conclude the observations.   2)In the above case, try changing the battery capacity and repeat the simulation.  …

1)CONTROL LOGIC OF A WASHING MACHINE   AIM To implement control logic of a washing machine using stateflow as per the following 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 should be 200s followed…

DOOR BELL USING SOLENOID AIM To make a simulink model of doorbell using solenoid block. BLOCK DIAGRAM The simulink blocks used here are as follows , Signal builder Simulink to PS converter Switch Battery Solenoid Electrical reference Lever Ideal translational motion sensor PS to simulink converter Mechanical translational…

AIM To write a program in MATLAB to calculate specific heat,enthalpy and entropy for all the species in the given data file. And also to calculate the molecular weight of those species.   GOVERNING EQUATIONS Equations for specific heat, enthalpy and entropy are as follows,   `C_p/R = a1+a2*T+a3*T^2+a4*T^3+a5*T^4`…

AIM To write a code in MATLAB to optimize the stalagmite function and to find the global maxima of the function.   GOVERNING EQUATIONS Formulas for the stalagmite function , `f(x,y) = f_1,_x*f_2,_x*f_1,_y*f_2,_y`   `f_1,_x = [sin(5.1pi*x+0.5)]^6` `f_1,_y = [sin(5.1pi*y+0.5)]^6` `f_2,_x = exp[-4ln(2)(x-0.0667)^2/0.64]`…

AIMTo write a program in MATLAB to solve the ODE that represents the equation of motion of a simple pendulum with damping. GOVERNING EQUATIONSThe ordinary differential equation that represents the motion of a simple pendulum is as follows, `((d^2theta)/(dt^2))+(b/m)*((d theta)/(dt))+(g/l)*sintheta` = 0 Where, `theta`…