Supersonic Nozzle Flow Simulation using MacCormack Method

In this project, you will simulate the conditions for an inviscid flow inside a Subsonic-Supersonic Convergent-Divergent Isentropic Nozzle. You will perform a quasi-1D simulation using the FDM approach in MATLAB/Octave. The student will then investigate the conservation and non-conservation forms of the governing equations and learn their characteristics and applications. 

• 1D supersonic nozzle flow using MacCormack Method

• Implement Conservative and Non-Conservative form

• Implement Courant Number based time step control

• Solve Normalized Governing equations

  
  

Flow over a Backward Facing Step

In this project, you will simulate a laminar viscous flow across a sudden steep expansion in area and study the boundary layer separation phenomena. You will learn how to set up and run a case in OpenFOAM in the Linux environment. You will also learn how to customize the course code to suit this problem. And finally, implement different mesh grading factors and compare the results.

• Simulate this classical CFD benchmarking problem

• Run grid dependency test

• Implement mesh grading

• Study the boundary layer separation phenomenon

  
  

  
  

Automated BlockMesh Generation for Meshing Pipe Geometry

In this project, you will simulate the laminar viscous flow through a regular pipe using symmetry and wedge boundary conditions and compare the simulation result with the analytical one obtained using the Hagen-Poiseuille formula. You will to then write a program to automate the generation of the Mesh file. The simulation will be run in OpenFOAM and post-processed in Paraview. 

• Automate mesh generation process using MATLAB/Octave

• Perform Wedge Vs. Symmetry BC study

• Understand fully-developed flow and Hydro-dynamic entrance length

• Compare the results with the analytical result from Hagen-Poiseuille formula

Gear Sloshing Analysis through Dynamic Meshing

In this project, You will be analysing the sloshing effect of different lubricants in the gearbox through a dynamic mesh approach. You will be introduced to User-defined functions and its compiling procedure with ANSYS Fluent for providing motion to the gears. Also, You will gain knowledge of the various dynamic mesh settings like smoothing and re-meshing.

Concepts learnt:

1. Extracting the required 2D geometry from a complex component

2. Dynamic mesh settings

3. Methods to overcome floating point exception

4. Defining motion to gears by user-defined functions

Combustion Efficiency Calculation after Preheating

A recuperator is a heat exchanger in which energy from the exhaust of hot combustion products, i.e flue gases, is transferred to the inlet air for increasing its temperature. The effect of such preheating of air can be seen in improving combustion efficiency as well as Adiabatic Flame Temperature. This analysis is performed to effectively utilize the exhaust gas recirculation and increase the efficiency of the reactor. 

Solving STIFF ODE System by using Backward Differencing and a Multivariate Newton-Rhapson Solver

Auto Ignition

In this project, you will be exposed to the Cantera reactor network and its uses in solving various models. The reactor network allows you to calculate the expansion/compression work, heat transfer, mass transfer, and surface interaction with the environment. The auto-ignition gives the time required for combustion to take place and controlling it can be beneficial for controlling pollutants as well as for complete combustion.

Sensitivity Analysis

The correct description of chemical changes requires the application of reaction mechanisms consisting of several hundred or thousand reactions. This means that the chemistry of the combustion process is described by a huge number of parameters and hence the application of the sensitivity analysis techniques is very useful for its understanding of those parameters. 

Detailed chemical models are too big for many practical combustion simulations. Sensitivity analysis can be used for mechanism reduction, that is, finding a smaller model that produces similar predictions for some of the variables (i.e., species concentrations and temperature).

One Dimensional Flame Speed Analysis

The flame speed is the measured rate of expansion of the flame front in the combustion reaction. The flame speed of fuel is a property that determines its ability to undergo controlled combustion without detonation. This project is the study of flame speed by considering the effect of temperature, pressure and concentration on it.

Reaction Reduction Mechanism

This detailed mechanism for methane-air combustion(GRI3.0) is probably the most famous one. It comprises 325 reactions and 53 species. The reduced mechanisms include only the top reactions and the associated species. The reduced mechanisms with a certain number of species are able to adequately simulate the ignition delay, sensitivity  problem. Such a reduced mechanism saves a lot of computational resources as well as time. 

Diesel Engine Characterization

In this project, you will run closed cycle simulations of the CAT3410 engine using two different piston bowls. You will be looking at the effect of piston bowl shape on the final solution.

Port Fuel Injection

• Clean up complex CAD model using CONVERGE STUDIO

• Assign proper boundary and initial conditions

• Setup appropriate physical models (spray, turbulence, combustion and emissions)

• Running simulations in parallel

• Runtime results visualization

• Post processing results

• Cerating cut views, iso-surfaces, images and animations

You will also focus on analyzing the data obtained from your simulation using line plots. You can find an example below.Last but not least, there is a reason why CFD is called colorful fluid dynamics. Here are some visualizations that beautifully convey the complexities of the various physical phenomena that you can expect in an I.C Engine.

Case Study on AFT System : SI and CI Engines

• Detailed AFT circuit system integrated with the engine model to accurately model the chemistry that captures the engine out emissions using a 3 way catalytic converter
• Modelling DOC , DPF and SCR with Urea Injection strategy to meet the stringent Euro emission norms for commercial CI engines.
  

BS IV - VI Conversion of an Eicher Pro Truck Variant

Complete Engine + Aftertreatment modelling for a BS IV variant HDT [Heavy duty truck] by employing suitable in cylinder strategies and AFT techniques to convert the same into a BS VI compliant variant.