In this
project, investigation has been done on different Verification
and Validation methods in CFD. Various parameters like size of
domain, iterative convergence, grid convergence and confidence
interval for verification and validation of CFD results were
studied by using an aerodynamic model as a test case
Simulation of flow over the Ahmed
body was done to understand the flow process involved in drag
production. Through understanding the mechanism involved in
generating drag, one should be able to design a car to minimize
drag and therefore the minimize fuel consumption and maximize
performance. The project involved the creation of a generic car model
(Ahmed Body) using pre-the processing tool (GAMBIT) and surface mesh
was created using the same. Mesh refining, prism
layer creation and volume meshing was done in T-Grid. Fluent
6.2.16 has used as the solver.
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Onera M6 Wing As Validation Test Case For CFD
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The standard validation case
for transonic flow regime is studied in this project.
A parametric definition of ONERA M6 wing was used. A
journal file
was created using C-Programming and utilized in GAMBIT for
the creating geometry and surface mesh. Volume mesh creation and
refinement was done using T-Grid. The solution obtained by
Fluent solver is used for comparing different parameters
like coefficient of drag and lift with the available experimental
values.
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Lid Driven Cavity (LDC)
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Lid driven
cavity is standard test case which is followed by CFD
programmers for validating their code. The lid driven cavity
flow was simulated using GAMBIT and Tgrid as the preprocessing
tools and Fluent as the solver.
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Laminar and Turbulent flow over flat plate
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Flow over a
flat plate gives the idea of the viscous effects and
convective heat transfer of the fluid flow over a surface.
Fluid flow and heat transfer parameters like coefficient of
drag, heat transfer coefficient etc. are calculated for both
laminar and turbulent flow. Structured grid generation
software GridZ was used for mesh creation and Fluent was used
for solving Navier Stokes Equation along with energy
equation. This data was compared with the empirical
correlations.
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CFD Modeling and Analysis of Vortex Tube
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CFD
analysis was conducted towards optimization of the
critical parameters of a vortex tube such as
aspect ratio and cold end diameter to obtain maximum
temperature drop (sub-zero temperature). GAMBIT was
used for modeling and meshing of vortex tube. FLUENT
was used for the analysis purpose.
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Code Development for 2D Lid Driven Cavity
flow Simulation |
2D
unsteady incompressible flow was considered for
simulation. The governing equations were Non-Dimensionalised
and Stream function-Vorticity formulation was made. Successive Over-relaxation Method (SOR)
was used for solving the partial differential
equations. Gnuplot was used for post-processing
purposes and the code was written in C language.
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Simulation
of rotating flows driven by axisymmetric
agitators in rotating cylinder
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The basic
intention behind this mini
project work was to analyze the flow
behavior, when it is agitated by Rotating
axisymmetric agitators (rotating in
clockwise direction). The cylinder containing
fluid is rotating in anticlockwise
direction. The analysis was carried out on
FLUENT and CFX.
