Hierarchical Grids

Hierarchical grids are a variation on MultiBlock Grids where the individual blocks not only overlap but are completely contained within other blocks. This way a coarse grid can be contained in the top-level, while each block can contain multiple other blocks of higher resolution.

This allows the researcher to perform the simulation in a "multipass" scenario where, based on the coarse simulation results, areas of interest can be found and reprocessed at higher resolution.

The most commonly used Hierarchical Grid structure is Adaptive Mesh Refinement (AMR).

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