On some numerical schemes for transonic flow problems

Author:
Marco MoschÃ© Mostrel

Journal:
Math. Comp. **52** (1989), 587-613

MSC:
Primary 65M05; Secondary 76H05

DOI:
https://doi.org/10.1090/S0025-5718-1989-0955752-2

MathSciNet review:
955752

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Abstract | References | Similar Articles | Additional Information

Abstract: New second-order accurate finite difference approximations for a class of nonlinear PDE's of mixed type, which includes the 2D Low Frequency Transonic Small Disturbance equation (TSD) and the 2D Full Potential equation (FP), are presented.

For the TSD equation, the scheme is implemented via a time splitting algorithm; the inclusion of flux limiters keeps the total variation nonincreasing and eliminates spurious oscillations near shocks. Global Linear Stability, Total Variation Diminishing and Entropy Stability results are proven. Numerical results for the flow over a thin airfoil are presented. Current techniques used to solve the TSD equation may easily be extended to second-order accuracy by this method.

For the FP equation, the new scheme requires no subsonic/supersonic switching and no numerical flux biasing. Global Linear Stability for all values of the Mach number is proven.

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Additional Information

DOI:
https://doi.org/10.1090/S0025-5718-1989-0955752-2

Keywords:
Full potential equation,
transonic small disturbance equation,
transonic flow,
entropy condition,
difference approximations

Article copyright:
© Copyright 1989
American Mathematical Society