Cray and ANSYS Achieve Extreme Scaling Improvements on ANSYS Fluent Using CSCS’s Cray XC30 System

ANSYS and Cray worked together to boost the scaling of Tetra Pak's LES simulation on Fluent. First, ANSYS created a version of the application that used the Cray MPI library and allowed users to take full advantage of the Aries interconnect. Then, Cray ran a 105-million cell LES simulation of filling a bottle with detergent on CSCS's Cray XC30 system, calculating two time steps with 10 iterations per time step and measuring the wall clock time for these two time steps. The test produced great results with the code scaling to 14,000 cores.