High performance collisional PIC plasma simulation with modern GPUs

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Abstract

GPU implementation of the collisional Particle-In-Cell plasma model is proposed. The goal of this model is the simulation of Plasma Enhanced Chemical Vapour Deposition (PECVD) reactors with glow discharge plasma and also for simulation of fusion plasma with sufficient role of collisions. Vlasov equation is being solved by the Particle-In-Cell (PIC) method. Collision are simulated with the null collision technique. The important difference from the collisionless approach is that major time is taken by collision evaluation and not by particle push. GPU performance is increased by storing the particles in cells and also by the exclusion of synchronization of threads at the stage of current and density evaluation. Electromagnetic field is given by either the Maxwell equations or be the Poisson equation for electrostatic case. The Maxwell equations are solved by the FDTD method. The Poisson equation is solved by the hybrid method. Performance obtained at the moment is 0.5 TFLOPS for particle push with the Nvidia Tesla V100, and the parallels efficiency is 92% for a cluster with 250 nodes with 2 GPUs each resulting in 500 GPUs.

Original languageEnglish
Article number012005
JournalJournal of Physics: Conference Series
Volume1336
Issue number1
DOIs
Publication statusPublished - 20 Nov 2019
Event2nd Workshop on Numerical Modeling in MHD and Plasma Physics: Methods, Tools, and Outcomes, MHD-PP 2019 - Moscow, Russian Federation
Duration: 10 Oct 201911 Oct 2019

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