wiki:RootGrid

Version 3 (modified by trac, 12 years ago) ( diff )

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Root Grid

One of the base grids used in the ​AMR algorithm. Root grids have two important characteristics:

  1. They have the lowest level of resolution in the ​AMR structure.
  1. The problem domain is bounded by the collection of root grids, because any refined grids must lie wholly within the boundaries of the previous resolution level.

For computational expediency, AstroBEAR also requires that any grid of resolution n + 1 must lie completely within the bounds of a single grid of resolution n. This is not required by the ​AMR algorithm, but without this requirement parallel computing becomes infeasible. Therefore, we can add a third characteristic to AstroBEAR root grids:

  1. Each root grid contains all its subgrids completely within its bounds.
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