| Numerical Study of a Multigrid Method with Four Smoothing Methods for the Incompressible Navier-Stokes Equations in General Coordinates (1993) | |||||||||||||||
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| The performance of a linear multigrid method using four smoothing methods, called SCGS, CLGS, SILU and CILU is investigated for the incompressible Navier-Stokes equations in general coordinates, in association with Galerkin coarse grid approximation. Robustness and efficiency are measured and compared by application to test problems. The numerical results show that CILU is the most robust, SILU the least, with CLGS and SCGS in between. CLGS is the best in efficiency, SCGS and CILU follow, and SILU is the worst. 1 Introduction Robustness and efficiency of a multigrid method are strongly influenced by the smoother used. Many methods are not robust or not efficient mainly because the smoothers are not robust or not efficient. Because there are so many factors influencing robustness and efficiency, it is hard to say in general which method is the most appropriate choice for certain applications and for further development. Therefore comparisons based on the same criteria are needed, app... | |||||||||||||||
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