Large-eddy simulation of Rayleigh-Taylor mixing on the Sierra supercomputer
ORAL
Abstract
The Sierra system is Lawrence Livermore National Laboratory's first production supercomputer accelerated by graphics processing units (GPUs). As part of the system's initial acceptance testing in October 2018, large-eddy simulation was conducted of Rayleigh-Taylor mixing in a spherical geometry using 97.8 billion computational volumes across 16,384 GPUs on Sierra. This talk will discuss how the Sierra system enabled such a massive calculation and how the results have been used to inform development of the $k$-$L$-$a$-$V$ Reynolds-averaged Navier-Stokes (RANS) model for reacting turbulence [Morgan, B. E., Olson, B. J., Black, W. J., and McFarland, J. A., ``Large-eddy simulation and Reynolds-averaged Navier-Stokes modeling of a reacting Rayleigh-Taylor mixing layer in a spherical geometry.''\emph{Phys. Rev. E} \textbf{98}, 033111 (2018)].
*This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
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