TY - GEN
T1 - Active-domain marching for efficient high speed flow computations
AU - Nakahashi, Kazuhiro
AU - Saitoh, Eiji
AU - Sharov, Dmitri
PY - 1996
Y1 - 1996
N2 - A three-dimensional space-marching algorithm on unstructured grid to solve supersonic flows that may contain embedded subsonic regions is proposed. The method employs a domain-marching algorithm in which a computational domain, named active domain, is marched in the hyperbolic direction starting from the upstream boundary of the flow field. A masking procedure is employed to exclude nonactive areas during the flux computations to minimize overall arithmetic operations. The unmasked, active domain is integrated in time to get a locally converged solution. If embedded subsonic regions are present, the active domain is enlarged to cover the whole subsonic regions by supersonic points. The method was applied to compute three-dimensional internal and external flows with and without embedded subsonic region. It is demonstrated that the computational work can be significantly reduced by the present method as compared to conventional, time-marching unstructured grid methods.
AB - A three-dimensional space-marching algorithm on unstructured grid to solve supersonic flows that may contain embedded subsonic regions is proposed. The method employs a domain-marching algorithm in which a computational domain, named active domain, is marched in the hyperbolic direction starting from the upstream boundary of the flow field. A masking procedure is employed to exclude nonactive areas during the flux computations to minimize overall arithmetic operations. The unmasked, active domain is integrated in time to get a locally converged solution. If embedded subsonic regions are present, the active domain is enlarged to cover the whole subsonic regions by supersonic points. The method was applied to compute three-dimensional internal and external flows with and without embedded subsonic region. It is demonstrated that the computational work can be significantly reduced by the present method as compared to conventional, time-marching unstructured grid methods.
UR - http://www.scopus.com/inward/record.url?scp=84964311253&partnerID=8YFLogxK
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U2 - 10.2514/6.1996-2443
DO - 10.2514/6.1996-2443
M3 - Conference contribution
AN - SCOPUS:84964311253
SN - 9781563472121
T3 - 14th Applied Aerodynamics Conference
SP - 531
EP - 540
BT - 14th Applied Aerodynamics Conference
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 14th Applied Aerodynamics Conference, 1996
Y2 - 17 June 1996 through 20 June 1996
ER -