Abstract
Results are presented of a study to implement convergence acceleration techniques based on the multigrid concept in a three-dimensional computer code developed for solving Euler and Navier ‐Stokes equations. The multigrid method implemented is the full approximation storage ‐full multigrid algorithm, which is applicable to nonlinear equations. Multigrid convergence estimates based on a single-grid or bigrid stability analysis are performed. The latter was found to yield a better prediction of practical multigrid convergence rates. In typical applications, for both laminar and turbulent e ows, savings of up to 50 % in CPU time were obtained with the multigrid implementation.
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