Generalized finite compact difference scheme for shock/complex flowfield interaction

Authors:
Yiqing Shen;Gecheng Zha
Affiliations:
Dept. of Mechanical and Aerospace Engineering, University of Miami, Coral Gables, FL 33124, United States;Dept. of Mechanical and Aerospace Engineering, University of Miami, Coral Gables, FL 33124, United States
Venue:
Journal of Computational Physics
Year:
2011

Citing 22
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Abstract

A class of generalized high order finite compact difference schemes is proposed for shock/vortex, shock/boundary layer interaction problems. The finite compact difference scheme takes the region between two shocks as a compact stencil. The high order WENO fluxes on shock stencils are used as the internal boundary fluxes for the compact scheme. A lemma based on the property of smoothness estimators on a 5-points stencil is given to detect the shock position. There is no free parameter introduced to switch the compact scheme and the WENO scheme. Some numerical experiments are given and they demonstrate that the present scheme has low dissipation due to the compact central differencing scheme used in the smooth regions.