SMR and AMR

Static Mesh Refinement

Static Mesh Refinement means that some regions of the computational domain are covered by finer grids but they are fixed and not adaptive. This is not as flexible as AMR, but this is faster (and easier to analyze) than AMR and is often useful enough in some problems in astrophysics. So we recommend to use SMR instead of AMR if the regions of interest are known in advance. For the details of the grid structure, see Static Mesh Refinement.

Let us go back to the blast wave test in Cartesian coordinate again, and say we want to resolve the region near the center of the explosion (note: this is just an example and not physically motivated - you probably want to resolve the shock front, and see below for such applications with AMR).