Simulations of plasmas and fluids using anti-symmetric models

JOURNAL OF COMPUTATIONAL PHYSICS

卷:445

Article

Halpern, Federico D.¹  Sfiligoi, Igor^1,2  Kostuk, Mark¹  Stefan, Ryan¹ 

[1] Gen Atom, POB 85608, San Diego, CA 92186 USA

[2] Univ Calif San Diego, San Diego Supercomp Ctr, La Jolla, CA 92093 USA

关键词: Plasma;    Turbulence;    Conservation;    Anti-symmetry;   

DOI  :  10.1016/j.jcp.2021.110631

来源: Elsevier

【 摘 要 】

ALMA (Anti-symmetric, Large-Moment, Accelerated) is a fast, flexible, and scalable toolkit designed to solve hyperbolic conservation law systems in hybrid supercomputers. This manuscript describes the theoretical background and implementation of ALMA, which uses the anti-symmetric formulation of fluids to obtain simple, robust, and easily paralellizable code. Practical GPU acceleration is realized on entire applications with an overall gain factor of 2 to 4. ALMA also provides a parallel, GPU accelerated sparse solver based on geometric multigrid, capable of diagonalizing linear systems with 239 unknowns. We demonstrate ALMA's scaling and performance in petascale supercomputers and use standard fluid models to verify the overall approach with canonical benchmark problems. (C) 2021 Elsevier Inc. All rights reserved.

【 授权许可】

Free