Hybrid Adaptive Ray-Moment Method (HARM2): A highly parallel method for radiation hydrodynamics on adaptive grids

JOURNAL OF COMPUTATIONAL PHYSICS

卷:330

Article

Rosen, A. L.¹  Krumholz, M. R.²  Oishi, J. S.³  Lee, A. T.⁴  Klein, R. I.^4,5 

[1] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

[2] Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia

[3] Bates Coll, Dept Phys &Astron, Lewiston, ME 04240 USA

[4] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[5] Lawrence Livermore Natl Lab, POB L-23, Livermore, CA 94550 USA

关键词: Radiative transfer;    Hydrodynamics;    Parallelization;    Long characteristics;    Adaptive mesh refinement;   

DOI  :  10.1016/j.jcp.2016.10.048

来源: Elsevier

【 摘 要 】

We present a highly-parallel multi-frequency hybrid radiation hydrodynamics algorithm that combines a spatially-adaptive long characteristics method for the radiation field from point sources with a moment method that handles the diffuse radiation field produced by a volume-filling fluid. Our Hybrid Adaptive Ray-Moment Method (HARM(2)) operates on patch based adaptive grids, is compatible with asynchronous time stepping, and works with any moment method. In comparison to previous long characteristics methods, we have greatly improved the parallel performance of the adaptive long-characteristics method by developing a new completely asynchronous and non-blocking communication algorithm. As a result of this improvement, our implementation achieves near-perfect scaling up to O(10(3)) processors on distributed memory machines. We present a series of tests to demonstrate the accuracy and performance of the method. (C) 2016 Elsevier Inc. All rights reserved.

【 授权许可】

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