Abstract
For solving a problem on a fine mesh, the multigrid technology requires the definition of coarse levels, coarse grid operators and inter-grid transfer operators. For non-structured 3–D meshes in CFD, two major MG techniques have emerged in the last years. The first one relies on the use of non-nested triangulations while the second technique is associated to finite volume discretization and agglomeration/aggregation techniques. In this paper, we first present some automatic ways to coarsen 3-D meshes and show that these geometrical methods result in efficient multigrid algorithms. Then, we briefly describe the volume agglomeration method and shows an example of its application in a 3-D industrial CFD code.
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Carré, G., Carte, G., Guillard, H., Lanteri, S. (2000). Multigrid Strategies for CFD Problems on Non-Structured Meshes. In: Dick, E., Riemslagh, K., Vierendeels, J. (eds) Multigrid Methods VI. Lecture Notes in Computational Science and Engineering, vol 14. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-58312-4_1
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DOI: https://doi.org/10.1007/978-3-642-58312-4_1
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-67157-2
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