The particle components of MFIX-Exa are a natural candidate for offloading to the GPU.
The particle kernels are compute-intensive and can in principle be processed asynchronously with parts of the fluid advance.
The core components of the particle method in MFIX-Exa are:
@@ -55,12 +54,7 @@ The above algorithm deals with constructing a neighbor list for the particles on
Once the neighbor list has been constructed, collisions with both particles and walls can easily be processed.
We have created a GPU branch of MFIX that is capable of running with GPU support. As of this writing, the following operations in MFIX have been offloaded:
- Neighbor particles / neighbor list construction
- Particle-particle collisions
- Particle-wall collisions
- PIC Deposition (used in putting the drag force and solids volume fraction on the grid)
MFiX-Exa currently runs on both CPU-only and hybrid CPU/GPU architectures.
