Week 11- Broadband Noise modelling over Ahmed body

PROCEDURE:     WORKING PRINCIPLE OF A WASHING MACHINE:                       A washing machine by spinning at 800-1600 rpm helps soap and dirt with it to leave the surface of the cloth via centrifugal force and into outlet pipes hence…

Simulink for Mechanical & Electrical Engineers - Challenges Final Project Aim To study, analyze and make a detailed report on BAJA All Terrain Vehicle (ATV) model using Simulink & compare between its different modes. Objective Prepare a technical report explaining the model properties & comments on the results.…

Aim: To make a simulink model of a doorbell using solenoid block. To use a thermistor to sense the temperature of a heater & turn on or turn off the fan. 1.Door Bell Simulink Model: Simulink Model Explanation: The pulse generator is used to create square wave pulses at regular intervals.The block waveform parameters…

1.AIM : TO MODEL AND PERFORM THE CFD ANALYSIS OF A DOUBLE PIPE COUNTER FLOW HEAT EXCHANGER   2.OBJECTIVE : To model a double pipe counter flow heat exchanger using Solidworks. To perform CFD analysis of the double pipe counter flow heat exchanger using Solidworks flow simulation. To find the temperature of both…

Objective:-> To solve the 2D steady and unsteady (Transient) heat conduction equations by using the point iterative techniques. Following iterative technique can be used. Jacobi Gauss-seidel Successive over-relaxation Given data:-  Top Boundary = 600 K Bottom Boundary = 900 K Left Boundary = 400 K Right Boundary…

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 and the output of a model. FOR EXAMPLE: Effect of…

Assignment name-auto ignition using cantera Auto ignition -auto ignition is the spontaneous ignition of a fuel and air mixture without any external source of ignition. The lowest temperature at which it spontaneously ignites is called auto ignition temperature. The time of auto ignition (ignition delay) is very important…

AIM - To incorporate multivariate newton raphson solver for a time marching problem   OBJECTIVE - To create the python code that solves for transient multivariate newton raphson method and see if the implicit euler method works for varirying time step values.   THEORY -  In transient multivariate…

When does a ODE become unstable? In order to find the unstable condition for a ODE lets assume a equation for ODE and run the program for various dt. Equation:  f(y) = dy/dt = - 1000y-e^-t        For this equation we find the analytical results along with explicit and implicit methods for…

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+OCO+O2⇌CO2+O O+H2o⇌OH+OHO+H2o⇌OH+OH CO+OH⇌CO2+HCO+OH⇌CO2+H H+O2⇌OH+OH+O2⇌OH+O DERIVATION TO FIND RATE OF CHANGE OF CONCENTRATION:…

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…

HANDLING MIXTURES WITH CANTERA   AIM: To work with the Quantity class of Cantera to create various mixtures and explain how the mixture calculations are performed. OBJECTIVE:  Explain how the mixture calculations are performed.    Using the above image answer and solve the following questions Use…

 Adiabatic Flame Temperature Calculation using Python and Cantera. Aim : To study the effect of equivalence ratio on Adiabatic Flame Temperature using the Newton Raphson method and Cantera. To calculate the Adiabatic Flame Temperature for the constant pressure with heat loss. To calculate the Adiabatic Flame…

The angle visible is called the fuel-injector angle, this angle will be varied through the simulation and the results of the angle will be seen. A cavity is an extension from the tube of the main engine, and serves as a side-stop for combustion so that the main airflow isn't affected. A single cavity is as seen below:…

In this challenge, you are required to do the following. Describe Ahmed's body and its importance. Setup the domain and setup assuming the body is traveling at 110 mph 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…

Aim: To Simulate the motion of blades in a generic turbomachinery component using an unsteady approach. Case-setup & Boundary Conditions: Pressure-Based unsteady solver. Viscous Model K-e model realizable We first have to run a few iterations using the moving frame approach then we have to append the different regions…

There are two types of motion encountered in fluid flow, they are rectilinear and rotary. There are two approaches to model rotary motion: Moving reference frame  Moving mesh appraoch. Moving refernce frame: A Moving Reference Frame (MRF) is a relatively simple, robust, and efficient steady-state, Computational fluid…

    Part 1: Explain different turbulence models & why DNS isn't feasible according to Kolmogorov's scale. There are two main models are available to model turbulence which are as follows: 1. First Order Models: First order models assume analogy between laminar & turbulent flows. They assume that the average…

output case 1 velocity 240m/s pressure -2817 pa calculations: case 3:  

        Results:      Conclusions:

Questions based on PR Engine: Ql. What is the Compression ratio for the engine? Compression ratio is defined as a ratio of the maximum volume to the minimum volume of the combustion 5.74e cylinder. in our case compression ratio is 5.74e-4/ 5.75e-5=  10.07  Q2. Modify the compression ratio for this engine to 10.3…

Objective: We should simulate 2 types of piston heads: open-W and Omega shape. Our objective is to see how the design of a piston head affects engine performance and emission characteristics. Creating 60" section of the combustion cylinder To create a section of the combustion we are using the tool "Make engine sector…

Objective:we have already created a no-hydro simulation of the PFI case in the challenge "Week 9: Project 1 - Surface preparation and Boundary Flagging (PR)", now its time to set up a full-hydro case and see how the combustion occurs in our engine. Engine parameters • Engine Geometric Parameters 1. Bore =0.086 m 2.…

The first orange-colored region is the Exhaust region and the green one is called the Cylinder region (Cylinder where the combustion takes place.)          As you see the valve is open (marked with the red lines), therefore we need a concept called "Disconnect triangles in order to avoid airflow…

Aim: Reynolds-averaged Navier-Stokes derivation and analysisIntroduction and Theory: The RANS equations are time-averaged equations of motion for fluid flow. The idea behind the equation is Reynolds decomposition, wherein an instantaneous quantity is decomposed into its time-averaged and fluctuating quantities. The RANS…

Aim: Shock Tube Simulation Objectives: • To set up a transient shock tube simulation • To plot the pressure and temperature 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 an instrument used to replicate…

Objective: To simulate the Sow through the solid pipe "Conjugate heat transfer" and understand super cycling. We have to perform the following tasks: Baseline configuration • Setup a flow simulation through a pipe • Inlet Reynolds number should be 7,000 HINT: Use the below formula to calculate velocity for the…

Aim:  To study the flow over the Convex corner or expansion waves • To study the influence of SUB-GRID-CRITERION on the results. • Literature review on Boundary Conditions and Shock flow • To simulate the Prandtl_Meyer expansion Wave   Prandtl-Meyer Expansion Fan: A supersonic expansion fan, technically…

Introduction: Definition of the throttle valve: A valve designed to regulate the supply of.. (as steam or gas and air) to an engine  is operated by a  handwheel, a lever, or automatically by a governor. Especially the valve in an internal-combustion engine incorporated in and are regulated for controlling the…

Aim: Steady state simulation of flow over a throttle body Object:Set up and run the steady-state simulation for flow over the throttle body.Post-process the results and show pressure and velocity contoursShow the meshShow the plots of pressure, velocity, mass flow rate  Introduction:    A…

Aim: To flow over a backward-facing step  Objective: The simulation is run for the three different mesh sizes S.No dx (m) dy (m) dz  (m) MESH 1 2.00E -03 2.00E -03 2.00E -03 MESH 2 1.50 E -03 1.50 E -03 1.50 E -03 MESH 3 1.20 E - 03 1.20 E - 03 1.20 E - 03   Contents to be shown in the report: 1. Show the…

            I. INTRODUCTION           Channel flow is an internal flow in which the confining walls change the hydrodynamic structure of the flow from an arbitrary Mote at the channel inlet to a certain state at the outlet The simplest illustration of internal flow…

  The 2D Conduction two types are Steady-state heat conduction Un steady-state or transient heat conduction             `∂^2 T/ ∂x^2 + ∂^2 T / ∂y^2 + qg /k = 1/α * ∂T/∂t                …

                 foam file                format     ascii;                class      dictionary;                                                                            …

              Objective:      To study the effect of the wedge angle and the Boundary Conditions on the simulation of an axisymmetric laminar flow in a cylindrical pipe.   The given wedge angles in degrees are- 10 25 45                                …

Hagen- Poiseuille's equations :                  Hagen–Poiseuille law, Poiseuille law or Poiseuille equation, is a physic law that gives the pressure drop in an incompressible and Newtonian fluid in laminar flow flowing through a long cylindrical pipe…

                          Major difference between finite volume and finite difference method: There are four numerical methods: Finite element method Boundary element method Finite volume method Finite difference method Finite volume method:  The Finite…

                   Using central differencing scheme:            (i-2)                    (i-1)                   …