Accession Number : ADA328117

Title :   Towards Perfectly Absorbing Boundary Conditions for Euler Equations,

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

Personal Author(s) : Hayder, M. E. ; Hu, Fang Q. ; Hussaini, M. Y.

PDF Url : ADA328117

Report Date : MAY 1997

Pagination or Media Count : 17

Abstract : In this paper, we examine the effectiveness of absorbing layers as non-reflecting computational boundaries for the Euler equations. The absorbing-layer equations are simply obtained by splitting the governing equations in the coordinate directions and introducing absorption coefficients in each split equation. This methodology is similar to that used by Berenger for the numerical solutions of Maxwell's equations. Specifically, we apply this methodology to three physical problems - shock-vortex interactions, a plane free shear flow and an axisymmetric jet, with emphasis on acoustic wave propagation. Our numerical results indicate that the use of absorbing layers effectively minimizes numerical reflection in all three problems considered.

Descriptors :   *SHOCK WAVES, *VORTICES, *EULER EQUATIONS, MATHEMATICAL MODELS, ACOUSTIC WAVES, COMPRESSIBLE FLOW, BOUNDARY VALUE PROBLEMS, JET FLOW, ABSORPTION COEFFICIENTS, SHEAR FLOW, AXISYMMETRIC FLOW.

Subject Categories : Fluid Mechanics
      Operations Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE