A multiblock/multilevel mesh refinement procedure for CFD computations (Q2747794)

The authors describe a multiblock/multilevel algorithm with local refinement for general two- and three-dimensional fluid flows. The patched-based local refinement procedure is presented in detail, and algorithmic implementations are also presented. The multiblock implementation is essentially block-unstructured in the computational domain, and can extend across block boundaries. To simplify the implementation, while still maintaining sufficient generality, the refinement is restricted to a grid refinement successively halving the grid size within a selected patch. The multiblock approach is implemented within the framework of the well-known SIMPLE solution strategy. Computational experiments showing the effect of using the multilevel solution procedure are presented for a sample elliptic problem and for a few benchmark problems of computational fluid dynamics (CFD).