A method of assessing the effects of artificial dissipation in Navier-Stokes codes

Macrossan, M. N. and Hancock, M. (1996) A method of assessing the effects of artificial dissipation in Navier-Stokes codes. International Journal for Numerical Methods in Fluids, 22 10: 979-985.

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Author Macrossan, M. N.
Hancock, M.
Title A method of assessing the effects of artificial dissipation in Navier-Stokes codes
Journal name International Journal for Numerical Methods in Fluids   Check publisher's open access policy
Publication date 1996-01-01
Sub-type Article
DOI 10.1002/(SICI)1097-0363(19960530)22:10<979::AID-FLD391>3.0.CO;2-B
Volume number 22
Issue number 10
ISSN 0271-2091
Start page 979
End page 985
Total pages 7
Language eng
Subject 240502 Fluid Physics
Abstract A new method of estimating the extent of the artificial dissipation effects in any solution obtained with a Navier-Stokes flow solver is described. Rather than recalculating the flow on a more refined grid, the solver may be used on the same grid to calculate the flow of an artificially dissipative fluid, which is a fluid having dissipative properties which arise entirely from the solution method itself. This is done by setting the viscosity and heat conduction coefficients in the Navier-Stokes solver to zero everywhere in the flow, while at the same time applying the usual boundary conditions at solid boundaries. An artificially dissipative flow solution will be found where the dissipation effects depend entirely on the solver itself. By comparing this solution with that obtained on the same grid with the solver working in its normal mode, one can estimate whether further grid refinement is required, without necessarily producing an extensive series of solutions on different grids.
Keyword viscous flow
artificial dissipation
solution accuracy
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown
Additional Notes This is an author version of an article originally published as Macrossan, M. N. and Hancock, M. (1996), A method of assessing the effects of artificial dissipation in Navier-Stokes codes, International Journal for Numerical Methods in Fluids 22 (10) : 979-985. doi: 10.1002/fld.1650170302 Copyright John Wiley & Sons 1996. All rights reserved.

Document type: Journal Article
Sub-type: Article
Collection: School of Mechanical & Mining Engineering Publications
 
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Created: Wed, 20 Dec 2006, 09:04:36 EST by Michael N Macrossan