A momentum coupling method for the unsteady incompressible Navier-Stokes equations on the staggered grid

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A new numerical method is developed to efficiently solve the unsteady incompressible Navier-Stokes equations with second-order accuracy in time and space. In contrast to the SIMPLE algorithms, the present formulation directly solves the discrete x- and y-momentum equations in a coupled form; It is found that the present implicit formulation retrieves some cross convection terms overlooked by the conventional iterative methods, which contribute to accuracy and fast convergence. The finite volume method is applied on the fully staggered grid to solve the vector-form momentum equations. The preconditioned conjugate gradient squared method (PCGS) has proved very efficient in solving the associate linearized large, sparse block-matrix system. Comparison with the SIMPLE algorithm has indicated that the present momentum coupling method is fast and robust in solving unsteady as well as steady viscous flow problems. (C) 1998 John Wiley & Sons, Ltd.
Publisher
JOHN WILEY & SONS LTD
Issue Date
1998
Language
English
Article Type
Article
Keywords

CIRCULAR-CYLINDER; REYNOLDS-NUMBERS; BLUFF-BODIES; FLOW; STEADY; WAKE

Citation

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, v.28, no.3, pp.443 - 460

ISSN
0271-2091
DOI
10.1002/(SICI)1097-0363(19980915)28:3<443::AID-FLD722>3.0.CO;2-G
URI
http://hdl.handle.net/10203/69069
Appears in Collection
AE-Journal Papers(저널논문)
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