A Discontinuous Galerkin Fast Spectral Method for Multi-Species Full Boltzmann on Streaming Multi-Processors
A Discontinuous Galerkin Fast Spectral Method for Multi-Species Full Boltzmann on Streaming Multi-Processors
复制标题
流式多处理器上多物种全玻尔兹曼的不连续伽辽金快速谱方法
DOI:
10.1145/3324989.3325714
复制
发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Alexeenko, Alina A.
中科院分区:
文献类型:
--
作者:
Jaiswal, Shashank;Hu, Jingwei;Brillon, Julien K.;Alexeenko, Alina A.
When the molecules of a gaseous system are far apart, say in microscale gas flows where the surface to volume ratio is high and hence the surface forces dominant, the molecule-surface interactions lead to the formation of a local thermodynamically non-equilibrium region extending few mean free paths from the surface. The dynamics of such systems is accurately described by Boltzmann equation. However, the multi-dimensional nature of Boltzmann equation presents a huge computational challenge. With the recent mathematical developments and the advent of petascale, the dynamics of full Boltzmann equation is now tractable. We present an implementation of the recently introduced multi-species discontinuous Galerkin fast spectral (DGFS) method for solving full Boltzmann on streaming multi-processors. The present implementation solves the inhomogeneous Boltzmann equation in span of few minutes, making it at least two order-of-magnitude faster than the present state-of-art stochastic method---direct simulation Monte Carlo---widely used for solving Boltzmann equation. Various performance metrics, such as weak/strong scaling have been presented. A parallel efficiency of 0.96--0.99 is demonstrated on 36 Nvidia Tesla-P100 GPUs.
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影响因子:
8.6
作者:
M. Krook;T. Wu
通讯作者:
T. Wu
DOI:
10.1016/j.cma.2019.04.015
发表时间:
2019-03
影响因子:
7.2
作者:
S. Jaiswal;Alina A. Alexeenko;Jingwei Hu
通讯作者:
S. Jaiswal;Alina A. Alexeenko;Jingwei Hu
影响因子:
3.1
作者:
Gamba, Irene M.;Haack, Jeffrey R.;Hu, Jingwei
通讯作者:
Hu, Jingwei
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
F. Sharipov;Denize Kalempa
通讯作者:
Denize Kalempa
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
Shingo;Kosuge;Shigeru;Takata;Shingo Kosuge;H. Yoshida and K. Aoki;Kazuo Aoki;Shigeru Takata;Kazuo Aoki;Kazuo Aoki;Shigeru Takata
通讯作者:
Shigeru Takata