Parallelization in two-dimensional direct numerical simulation

摘要

We are performing direct numerical simulation of two-dimensional (2D) Navier-Stokes turbulence at high Reynolds numbers (Re) in order to study some predictions from statistical mechanics. Two dimensions present some bottlenecks to parallelization that affect the current computations. We parallelize the code by distributing the major, time-consuming part of it within the time loop, assigning it to different cpu's. The performance of our MPI Fortran90 code on the SGI Origin 3800 is reported. A few computational results relevant to the statistical-mechanical predictions are illustrated.