Dual Grid Approach
In AMReX-based applications that have both mesh data and particle data, the mesh work and particle work have very different requirements for load balancing.
Rather than using a combined work estimate to create the same grids for mesh and particle data, we have the option to pursue a “dual grid” approach.
With this approach the mesh (
MultiFab) and particle (
are allocated on different
BoxArrays with different
This enables separate load balancing strategies to be used for the mesh and particle work.
The cost of this strategy, of course, is the need to copy mesh data onto temporary
MultiFabs defined on the particle
BoxArrays when mesh-particle communication