Numerical Simulations

Computational hydrodynamics is one of those fortunate problems that adapts nicely to parallel computing. If your desktop workstation can evolve a 2D simulation in an hour, then a few hundred such computers can do a comparable 3D simulation in an hour.

Our parallel version of VH-1 using MPI is extremely simple, but it works very well and maintains the adaptability of VH-1 that has made it so successful. Our approach is to break up the 3D domain into 2D planes, with each plane computed on a different processor. Evolution in the direction across planes is computed locally on individual processors after the data is transposed across processors with a single MPI_ALLTOALL call.