期刊
JOURNAL OF COMPUTATIONAL PHYSICS
卷 227, 期 9, 页码 4671-4696出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2008.01.017
关键词
incompressible Navier-Stokes equations; variable density flows; finite element method; finite volume method; Rayleigh-Taylor instability
This paper is devoted to the numerical simulation of variable density incompressible flows, modeled by the Navier-Stokes system. We introduce an hybrid scheme which combines a finite volume approach for treating the mass conservation equation and a finite element method to deal with the momentum equation and the divergence free constraint. The breakthrough relies on the definition of a suitable footbridge between the two methods, through the design of compatibility condition. In turn, the method is very flexible and allows to deal with unstructured meshes. Several numerical tests are performed to show the scheme capabilities. In particular, the viscous Rayleigh-Taylor instability evolution is carefully investigated. (C) 2008 Elsevier Inc. All rights reserved.
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