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Please use this identifier to cite or link to this item: http://hdl.handle.net/2005/277

Title: 2D Compressible Viscous Flow Computations Using Acoustic Flux Vector Splitting (AFVS) Scheme
Authors: Ravikumar, Devaki
Advisors: Balakrishnan, N
Deshpande, S M
Keywords: Navier-stokes Equation
Computational Fluid Dynamics
Viscous flow Computations
Grid Adaptation
Finite Volume Methods
Boundary Conditions
Cell Centered Finite Volume Method
Cell Vertex Finite Volume Method
Acoustic Flux Vector Splitting (AFVS) Scheme
Finite Volume Flux Formulae
Shock Wave
Hakkinen's Problem
Triangulated Grids
Submitted Date: Sep-2001
Publisher: Indian Institute of Science
Abstract: The present work deals with the extension of Acoustic Flux Vector Splitting (AFVS) scheme for the Compressible Viscous flow computations. Accurate viscous flow computations require much finer grids with adequate clustering of grid points in certain regions. Viscous flow computations are performed on unstructured triangulated grids. Solving Navier-Stokes equations involves the inviscid Euler part and the viscous part. The inviscid part of the fluxes are computed using the Acoustic Flux Vector Splitting scheme and the viscous part which is diffusive in nature does not require upwinding and is taken care using a central difference type of scheme. For these computations both the cell centered and the cell vertex finite volume methods are used. Higher order accuracy on unstructured meshes is achieved using the reconstruction procedure. Test cases are chosen in such a way that the performance of the scheme can be evaluated for different range of mach numbers. We demonstrate that higher order AFVS scheme in conjunction with a suitable grid adaptation strategy produce results that compare well with other well known schemes and the experimental data. An assessment of the relative performance of the AFVS scheme with the Roe scheme is also presented.
URI: http://etd.iisc.ernet.in/handle/2005/277
Appears in Collections:Aerospace Engineering (aero)

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