Stable and entropy satisfying approximations for transonic flow calculations

Engquist, Björn; Osher, Stanley

doi:10.1090/S0025-5718-1980-0551290-1

Stable and entropy satisfying approximations for transonic flow calculations
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by Björn Engquist and Stanley Osher PDF

Math. Comp. 34 (1980), 45-75 Request permission

Corrigendum: Math. Comp. 34 (1980), 652.

Abstract:

Finite difference approximations for the small disturbance equation of transonic flow are developed and analyzed. New schemes of the Cole-Murman type are presented for which nonlinear stability is proved. The Cole-Murman scheme may have entropy violating expansion shocks as solutions. In the new schemes the switch between the subsonic and supersonic domains is designed such that these nonphysical shocks are guaranteed not to occur. Results from numerical calculations are given which illustrate these conclusions.

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