Improved domain partitioning on tree-based mesh-refined lattice Boltzmann method

Hasegawa, Yuta; Aoki, Takayuki*; Kobayashi, Hiromichi*; Idomura, Yasuhiro; Onodera, Naoyuki

Keisan Kogaku Koenkai Rombunshu (CD-ROM), 26, 6 Pages, 2021/05

We introduce an improved domain partitioning method called "tree cutting approach" for the aerodynamics simulation code based on the lattice Boltzmann method (LBM) with the forest-of-octrees-based local mesh refinement (LMR). The conventional domain partitioning algorithm based on the space-filling curve (SFC), which is widely used in LMR, caused a costly halo data communication which became a bottleneck of our aerodynamics simulation on the GPU-based supercomputers. Our tree cutting approach adopts a hybrid domain partitioning with the coarse structured block decomposition and the SFC partitioning in each block. This hybrid approach improved the locality and the topology of the partitioned sub-domains and reduced the amount of the halo communication to one-third of the original SFC approach. The code achieved speedup on 8 GPUs, and achieved speedup at the performance of 2207 MLUPS (mega-lattice update per second) on 128 GPUs with strong scaling test.

Development of unstructured mesh generator on parallel computers

Muramatsu, Kazuhiro; Shimada, Akio*; Murakami, Hiroyuki*; Higashida, Akihiro*; Wakatsuki, Shigeto*

Keisan Kogaku Koenkai Rombunshu, p.353 - 356, 2000/05

no abstracts in English

Development of real-time visualization system for computational fluid dynamics on parallel computers

Muramatsu, Kazuhiro; Otani, Takayuki; Matsumoto, Hideki*; Takei, Toshifumi*; Doi, Shun*

JAERI-Data/Code 98-014, 35 Pages, 1998/03

JAERI-Data-Code-98-014.pdf:1.83MB

no abstracts in English

An Object-oriented programming paradigm for parallel computational fluid dynamics on memory distributed parallel computers

*

Parallel Computational Fluid Dynamics, p.561 - 568, 1998/00

no abstracts in English

Development of structured grid generator on parallel computers

Muramatsu, Kazuhiro; Murakami, Hiroyuki*; Higashida, Akihiro*; Yanagisawa, Ichiro*

Keisan Kogaku Koenkai Rombunshu, 2(1), p.113 - 116, 1997/05

no abstracts in English

Structured grid generator on parallel computers

Muramatsu, Kazuhiro; Murakami, Hiroyuki*; Higashida, Akihiro*; *

JAERI-Data/Code 97-005, 42 Pages, 1997/03

JAERI-Data-Code-97-005.pdf:1.51MB

no abstracts in English

DSMC analysis for the Rayleigh-Benard flow by parallel computing

*; Yokokawa, Mitsuo; Watanabe, Tadashi;

Keisan Kogaku Koenkai Rombunshu, 1(1), p.117 - 120, 1996/05

no abstracts in English

Parallel simulation on Rayleigh-Benard convection in 2D by the direct simulation Monte Carlo method

Yokokawa, Mitsuo; D.Schneider*; Watanabe, Tadashi;

Parallel Computational Fluid Dynamics; Implementations and Results Using Parallel Computers, 0, p.75 - 80, 1995/00

no abstracts in English