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Time Dependent Operator-split and Unsplit Schemes for One Dimensional Premixed Flames

Goyal, G and Paul, PJ and Mukunda, HS and Deshpande, SM (1988) Time Dependent Operator-split and Unsplit Schemes for One Dimensional Premixed Flames. In: Combustion Science and Technology, 60 (1-3). pp. 167-189.

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Official URL: http://www.informaworld.com/smpp/content~db=all~co...

Abstract

This paper is concerned with a study of an operator split scheme and unsplit scheme for the computation of adiabatic freely propagating one-dimensional premixed flames. The study uses unsteady method for both split and unsplit schemes employing implicit chemistry and explicit diffusion, a combination which is stable and convergent. Solution scheme is not sensitive to the initial starting estimate and provides steady state even with straight line profiles (far from steady state) in small number of time steps. Two systems H2-Air and H2-NO (involving complex nitrogen chemistry) are considered in presentinvestigation. Careful comparison shows that the operator split approach is slightly superior than the unsplit when chemistry becomes complex. Comparison of computational times with those of existing steady and unsteady methods seems to suggest that the method employing implicit-explicit algorithm is very efficient and robust.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 13 Oct 2010 09:00
Last Modified: 13 Oct 2010 09:00
URI: http://eprints.iisc.ernet.in/id/eprint/33054

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