Week 2 - Converging diverging nozzle

BROADBAND NOISE MODELLING OVER AHMED BODY 1 INTRODUCTION 1.1 Ahmed body An ahmed body is a generic car body, also a simplified car model. The airflow around the ahmed body characterises the essential flow features around an automobile body. It is used for numerical validation and describing turbulent flow features. It…

 UNSTEADY SIMULATION OF MOTION OF BLADES IN TURBOMACHINERY COMPONENT 1 INTRODUCTION: The moving cell zone capability in Fluent provides a powerful set of features for solving problems in which the domain or parts of the domain are in motion. It is classified into single rotating frame and multiple rotating or translating…

AIM: To observe the lift and drag characteristics of an airfoil in subsonic and supersonic flow regimes. 1 INTRODUCTION: The slope of the linear portion is called the lift slope. For thin airfoils, a theoretical value for the lift slope is 2pi per radian or 0.11 per degree. There is a finite value of Cl at 0 angle of attack…

1. What are the approaches by which you would model moving zones? The moving cell zone capability in Fluent provides a powerful set of features for solving problems in which the domain or parts of the domain are in motion. It is classified into single rotating frame and multiple rotating or translating reference frames.…

TURBULENCE MODELLING ON A GOLF BALL 1 INTRODUCTION: The aerodynamics of a golf ball is a complex study that has years of research in it. A smooth ball has a laminar flow around it. The fluid flow downstream detaches from the surface of the ball in the form of vortices. This is called flow separation, which gives rise to…

SIMULATION OF PITOT STATIC TUBE: 1 INTRODUCTION: Static pressure: It is a measure of the purely random motion of molecules in the gas. It is the pressure along the local flow velocity of the gas. Total pressure / Stagnation pressure: It is the pressure that the flow achieves when the velocity is reduced to zero.  …

SIMULATION OF CONVERGING-DIVERGING NOZZLE: 1 INTRODUCTION:   The best application of a converging-diverging nozzle is found in the rocket engine for space shuttles. These engines produce around 4,00,000 pounds of thrust which lifts the entire launch vehicle. A combustion chamber is present which feeds the hot high-pressure…

MESHING OF BMW CAR: 1 AIM: To perform surface meshing of the given BMW M6 car model after topology cleanup, and place the car in a wind tunnel by creating one, Finally performing a volumetric mesh in the space between the tunnel and the car.   2 INTRODUCTION: The primary challenge in conducting aerodynamic CFD simulations…

CFD MESHING OF TESLA CYBER TRUCK SHELL 1 AIM: To perform the volumetric meshing of a Tesla Cyber Truck with quality optimization, inside a Wind tunnel by a step by step process of geometry clean-up and surface meshing.   2 INTRODUCTION: ANSA has a long history of development and application throughout many industries,…

SURFACE WRAP ON AUTOMOTIVE ASSEMBLY: 1 AIM: To create a surface wrap by performing a surface meshing on the models after topology cleanup and merging sub-assemblies.   2 INTRODUCTION: With the significant advances in CFD over the last few decades and the increasing availability of high-performance computing resources,…

MESHING OF A TURBOCHARGER: AIM: To conduct surface and volumetric meshing on a turbocharger model.   INTRODUCTION: CFD simulations are always the forefront of memory demanding CAE applications, as size of volume mesh used for them increases continuously. Current CFD simulations for external aerodynamics are performed…

SURFACE MESHING ON A PRESSURE VALVE: Aim: To remove the geometrical errors on the given pressure valve model, to do topology cleanup and do a surface meshing on the model with 3 different mesh lengths   Introduction: Topology is how the surfaces connect to adjacent surfaces of a part. Surface connectivity is controlled…

SIMULATION OF NATURAL GAS COMBUSTION Introduction: Methane is a main component of biogas an fossil natural gas and also stands at a transition point of fossil fuel and bio fuel. It is also known for its lesser harmful pollutants compared to other gaseous or liquid fossil fuels, and hence an environment-friendly fuel. It…

PARAMETRIC GATE VALVE SIMULATION Introduction: Gate valve: A gate valve is a hydraulic control device used in pipes and conduits to restrict the flow of a fluid. It is also known as sluice valves. The geometry is so simple involving a disc or ball type obstruction fitted inside a bottom and bonnet assembly. The control…

SIMULATION OF CYCLONE SEPARATOR EFFICIENCY AND PRESSURE DROP CALCULATION  Introduction: The main aim of this study is to calculate the emphasis of temperature, operating pressure and inlet velocity on the separator efficiency of a cyclone separator. Typically cyclone separators are used in cement industries to filter…

CONJUGATE HEAT TRANSFER ANALYSIS ON GRAPHICS CARD Aim: To determine the hotspots of a graphic card, the various heat transfer coefficients, there by predicting the durability and efficiency of the component.   Introduction: A heat transfer analysis involves the calculation of the temperature distribution and flow…

RAYLEIGH TAYLOR INSTABILITY Introduction: Rayleigh Taylor Waves                Rayleigh-Taylor waves describe an instability of an interface between two fluids of different densities which occurs when the lighter fluid is pushing the heavier fluid. Beginning from a state of hydrostatic…

CONJUGATE HEAT TRANSFER ANALYSIS Introduction: A typical heat transfer analysis involves the calculation of the temperature distribution and flow of heat flux under thermal loads. Both steady-state and transient conditions are simulated. The study of transport phenomenon concerns the exchange of momentum, energy and mass…

Aim: To understand the flow characteristics of the ahmed body in significance to the negative pressure in the wake region and the point of separation. Introduction: Ahmed Body: An ahmed body is a generic car body, also a simplified car model. The airflow around the ahmed body characterises the essential flow features around…

Aim: To simulate flow over a cylinder by using a 2D surface as model Differentiate among solving steady and unsteady solvers Calculate strouhal number Effect of reynolds number on co-efficient of drag Introduction: Flow over a cylinder: To clearly understand the aerodynamics of different bodies in various applications…

Aim: To perform a steady state simulation to analyse the mixing effectiveness in a Tee joint when two streams of hot (@ 36degC) and cold jet (@19deg C) mixes. Also to identify the variation of results between using the K-epsilon and K-omega methods. To calculate the cell count, average outlet temperature, number of iterations…

Fully developed internal flow: Consider a fluid entering a circular pipe at a uniform velocity. Because of the no-slip condition, the fluid particles in the layer in contact with the wall of the pipe come to a complete stop. This layer also causes the fluid particles in the adjacent layers to slow down gradually as a result…

Fully developed internal flow: Consider a fluid entering a circular pipe at a uniform velocity. Because of the no-slip condition, the fluid particles in the layer in contact with the wall of the pipe come to a complete stop. This layer also causes the fluid particles in the adjacent layers to slow down gradually as a result…

The given geometry is divided into 5 blocks with 21 vertex points. Simple grading is done. Tutorial selected: incompressible - icoFoam - cavity Case 1: Meshing without grading, i.e simple grading with grading factor 0.2 is used. Step 1:Modify blockMeshDict file: blockMeshDict file: /*--------------------------------*-…

  Explanation: Right side skewed difference scheme: Order of accuracy (P) = No. of nodes in the stencil (N) – order of the derivative (Q) N= P+Q Here: P =2; Q=4 (For 4th order accuracy of a 2nd order derivative) Hence No. of terms = 6 Taylor table:   f(i) Δx f’(i) Δx2 f’’(i)…

FINITE VOLUME METHOD: It is a method for evaluating partial differential equations by representing them in the form of algebraic equations. In this method, divergence theorem is used to convert volume integrals in a partial difference equations that contain divergence term into surface integrals. These terms are evaluated…

Solving 2D heat conduction under steady, usteady,transit conditions: Steady state jacobi iterations: close all clear all clc nx=10; ny=nx; x=linspace(0,1,nx); y=linspace(0,1,ny); dx=x(2)-x(1); dy=dx; error=9e9; tolerance=1e-4; T_L=400; T_R=800; T_T=600; T_B=900; T=300*ones(nx,ny); T(2:ny-1,1)=T_L; T(2:ny-1,nx)=T_R; T(1,2:nx-1)=T_T;…