Zaspel, P.P.ZaspelGriebel, M.M.Griebel2022-03-042022-03-042013https://publica.fraunhofer.de/handle/publica/23154710.1016/j.compfluid.2012.01.021We present a fully multi-GPU-based double-precision solver for the three-dimensional two-phase incompressible Navier-Stokes equations. It is able to simulate the interaction of two fluids like air and water based on a level-set approach. High-order finite difference schemes and Chorin's projection approach for space and time discretization are applied. An in-depth performance analysis shows a realistic speed-up of the order of three by comparing equally priced GPUs and CPUs and more than a doubling in energy efficiency for GPUs. We observe profound strong and weak scaling on two different multi-GPU clusters.en003005006518journal article