Twinkle, Twinkle Little Star - Using 18.000 GPUs to Simulate Jets in the Cosmos

Twinkle, Twinkle Little Star - Using 18.000 GPUs to Simulate Jets in the Cosmos

Bussmann, M.; Burau, H.; Cowan, T. E.; Debus, A.; Huebl, A.; Juckeland, G.; Kluge, T.; Nagel, W. E.; Pausch, R.; Schmitt, F.; Schramm, U.; Schuchart, J.; Widera, R.

Abstract

In order to understand what happens when jets of hot, streaming gas are ejected at high speed into the cosmos, we are bound to rely on m easuring the radiation emitted by the particles in the jet. Astrophysical jets can originate from a variety of sources such as stars, black holes and even galaxies. In such jets, the plasma flow can become unstable, generating characteristic patterns of p article flows. Using our particle-in-cell code PIConGPU utilizing the complete TITAN supercomputer system at Oak Ridge National Laboratory, we were able, for the first time, to not only simulate the particle dynamics but also the radiation emitted during the formation of such an instability, the Kelvin-Helmholtz instability.

Keywords: kelvin-helmholtz-instability; plasma; simulation; jet; astrophysics; gpu; titan; ornl; picongpu; particle-in-cell; pic; simulation; khi

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Permalink: https://www.hzdr.de/publications/Publ-19368