Higher-order CFD and interface tracking methods on highly-Parallel MPI and GPU systems
A computational investigation of the effects on parallel performance of higher-order accurate schemes was carried out on two different computational systems: a traditional GPU based MPI cluster and a system of four Graphics Processing Units (GPUs) controlled by a single quad-core GPU. The investigation was based on the solution of the level set equations for interface tracking using a High-Order Upstream Central (HOUC) scheme. Different variants of the HOUC scheme were employed together with a 3rd-order TVD Runge-Kutta time integration. An increase in performance of two orders of magnitude was seen when comparing a single GPU core to a single GPU with a greater increase at higher orders of accuracy and at lower precision. (C) 2010 Elsevier Ltd. All rights reserved.
interface tracking gpu high-order schemes