Multigrid convergence of an implicit symmetric relaxation scheme

Journal Article · Sun May 01 00:00:00 EDT 1994 · AIAA Journal (American Institute of Aeronautics and Astronautics); (United States)

DOI:https://doi.org/10.2514/3.12079· OSTI ID:7083099

Yoon, Seokkwan; Kwak, Dochan ^[1]

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1. NASA-Ames Research Center, Moffett Field, CA (United States)

The multigrid method has been applied to an existing three-dimensional compressible Euler solver to accelerate the convergence of the implicit symmetric relaxation scheme. This lower-upper symmetric Gauss-Seidel implicit scheme is shown to be an effective multigrid driver in three dimensions. A grid refinement study is performed including the effects of large cell aspect ratio meshes. Performance figures of the present multigrid code on Cray computers including the new C90 are presented. A reduction of three orders of magnitude in the residual for a three-dimensional transonic inviscid flow using 920 k grid points is obtained in less than 4 min on a Cray C90. 23 refs.

• Research Organization: National Aeronautics and Space Administration, Moffett Field, CA (United States). Ames Research Center
• OSTI ID: 7083099
• Journal Information: AIAA Journal (American Institute of Aeronautics and Astronautics); (United States), Journal Name: AIAA Journal (American Institute of Aeronautics and Astronautics); (United States) Vol. 32:5; ISSN AIAJAH; ISSN 0001-1452
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
COMPRESSIBLE FLOW
COMPUTERIZED SIMULATION
COMPUTERS
CONVERGENCE
CRAY COMPUTERS
DIFFERENTIAL EQUATIONS
EQUATIONS
FLUID FLOW
MESH GENERATION
NAVIER-STOKES EQUATIONS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
SIMULATION
THREE-DIMENSIONAL CALCULATIONS
TRANSONIC FLOW