Week 10 - Simulating Combustion of Natural Gas.

Aim: To perform and study combustion simulation of a non-premixed model.   Introduction and Theory:  Combustion or burning is a high-temperature exothermic redox chemical reaction between a fuel(the reductant) and an oxidant, usually, atmospheric oxygen. Complete combustion is stoichiometric concerning the…

Aim: To solve steady and unsteady two dimensional heat conduction equation using implicit and explicit methods.   Objectives: 1. Write a MATLAB code to solve steady state two dimensional heat conduction equation using implicit method. 2. Write a MATLAB code to solve unsteady (transient) state two dimensional…

Aim: Simulation of quasi 1D subsonic-supersonic nozzle flow using MacCormack method.   Objectives: The objective of this project is to simulate an isentropic flow through a quasi 1D subsonic-supersonic nozzle using MacCormack method for conservative and non-conservative form of governing equations.   Theory:…

 Aim: To simulate flow through a pipe in OPENFOAM and validate the results.   Objectives:  1. To validate of hydrodynamic length with the numerical result. 2. Validate the fully developed flow velocity profile with its analytical profile. 3. Validate maximum velocity and pressure drop for fully developed…

Aim: To perform analysis on cyclone separator and calculate the separation efficiency and pressure drop.    Objectives: 1. To perform analysis for varying particle size from 1 `mum` to 5 `mum` with inlet velocity of 3 `m/s` 2. To perform analysis for varying velocity between 1 `m/s` to 5 `m/s`…

Aim: To perform a parametric study on the gate valve simulation and post-process the results.   Objectives: 1. To perform the simulation for diferrent gate valve opening (10% to 80%). 2. To investigate mass flow rate for each of the cases. 3. To calculate the flow coefficient and flow factor for each opening. 4. To…

Aim: To perform a steady-state conjugate heat transfer (CHT) analysis on a model of graphics card.    Objectives: 1. To perform CHT analysis with appropriate case set-up. 2. To run the case set-up for three different velocities ranging from 1 `m/s` to 5 `m/s`. 3. Investigate the maximum temperature and heat…

Aim: To perform Rayleigh-Taylor instability CFD simulation.   Objectives: 1. To develop a numerical case set-up for Rayleigh-Taylor instability problem in Ansys Fluent. 2. To conduct grid dependency test to understand the variation in RT instabilites. 3. To understand the effect on RT instabilities due to variation…

Aim: To develop a numerical set-up for conjugate heat transfer analysis on exhaust port.   Objectives: 1. Investigate wall adjacent and surface heat transfer coefficients. 2. Understand flow and thermal characteristics. 3. To perform mesh independent study. 4. Set-up a rough surface model to understand the effect…

Aim: To simulate external flow over an Ahmed body using Ansys fluent.   Objectives: 1. To set-up simulation case for velocity of 25 `m/s` with working fluid as air. 2. Simulate various cases with different `Y^+` values (coarse, medium and refined mesh at the boundary). 3. Calculate drag and lift coefficients…

Aim: To calculate all the state variables of a rankine cycle and plot t-s and h-s diagram.   Introduction: Rankine cycle: Rankine cycle is a thermodynamic cycle which is used to evaluate the performance of a steam turbine systems. Previously, it was used to study the performance of reciprocating steam engines. It…

 Aim: To set-up steady state simulations for computing mixing efficacy of a T-joint.    Objectives: 1. To set-up a steady state simulation to compute mixing effectiveness of the hot and cold fluid. 2. To use RANS based turbulence models and compare them to obtain best suitable model for the given case.…

Aim: To simulate flow past a cylinder with varying Reynolds number and interpret the flow characteristics.   Objectives: 1. Simulate the steady and unsteady (transient) cases for range of Reynolds number. 2. To calculate the drag and lift coefficients for the respective cases. 3. To calculate strouhal number for unsteady…

Aim: To simulate and analyze flow characteristics of a backward facing step in OpenFOAM.   Introduction: The study of fluid motion across various geometries is one of the major aspect of a CFD engineer. The fluid flowing over different geometries results into different flow fields (velocity field, pressure field and…

AIM: Write a MATLAB program that extracts the 14 co-efficients and calculates the enthalpy, entropy and specific heat for all the species in the data file (NASA Thermodynamic data).   Introduction: NASA introduced polynomials that can be used to calculate the thermodynamic properties such as Specific heat(Cp), Enthalpy…

Computational fluid dynamics is a branch of fluid mechanics that uses numerical analysis and data structures to analyze and solve problem that involves fluid flows. The fluid flow characteristics are very random and complex and usually defined by Navier-Stokes equations and Euler equations. These equations are in the differential…