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.


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    Title :

    Multigrid convergence of an implicit symmetric relaxation scheme


    Contributors:

    Published in:

    Publication date :

    1994-05-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English