Accession Number : ADA329454

Title :   Comparison of Several Dissipation Algorithms for Central Difference Schemes.

Descriptive Note : Research rept.,

Corporate Author : INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA

Personal Author(s) : Swanson, R. C. ; Radespiel, R. ; Turkel, E.

PDF Url : ADA329454

Report Date : AUG 1997

Pagination or Media Count : 28

Abstract : Several algorithms for introducing artificial dissipation into a central difference approximation to the Euler and Navier Stokes equations are considered. The focus of the paper is on the convective upwind and split pressure (CUSP) scheme which is designed to support single interior point discrete shock waves. This scheme is analyzed and compared in detail with scalar and matrix dissipation (MATD) schemes. Resolution capability is determined by solving subsonic transonic, and hypersonic flow problems. A finite-volume discretization and a multistage time-stepping scheme with multigrid are used to compute solutions to the flow equations. Numerical results are also compared with either theoretical solutions or experimental data. For transonic airfoil flows the best accuracy on coarse meshes for aerodynamic coefficients is obtained with a simple MATD scheme.

Descriptors :   *COMPUTATIONAL FLUID DYNAMICS, *AERODYNAMIC CHARACTERISTICS, ALGORITHMS, SHOCK WAVES, DISSIPATION, APPROXIMATION(MATHEMATICS), EULER EQUATIONS, SUBSONIC FLOW, NAVIER STOKES EQUATIONS, TRANSONIC FLOW, HYPERSONIC FLOW, TRANSONIC AIRFOILS.

Subject Categories : Aerodynamics
      Numerical Mathematics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE