JpGU-AGU Joint Meeting 2017

Presentation information

[JJ] Poster

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS15] [JJ] Geophysical fluid dynamics-Transfield approach to geoscience

Wed. May 24, 2017 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall HALL7)

convener:Keita Iga(Atmosphere and Ocean Research Institute, The University of Tokyo), Shigeo Yoshida(Department of Earth and Planetary Sciences, Faculty of Sciences, Kyushu University), Takatoshi Yanagisawa(Department of Deep Earth Structure and Dynamics Research, Japan Agency for Marine-Earth Science and Technology), Hidenori AIKI(Nagoya University)

[MIS15-P01] Development of Two-Dimensional Lattice Boltzmann Code and Its Coarray parallelization

*Junta Miyoshi1, Akira Kageyama1 (1.Kobe University)

Keywords:Lattice Boltzmann Method, Coarray parallelization , Fortran 2008

Since LBM is already a matured technique, there exist several open source LBM codes. Although it would be easy to use one of them, we intentionally develop our own LBM code from scratch, because it will help us to firmly understand the basics of the method. We also expect that having our own LBM code and the development experience would provide us with indispensable skills for making of a LBM-based new techniques in future.

For this end, we have developed a fundamental two-dimensional computational fluid dynamics solver based on LBM and parallelized the code. For the parallelization, we have adopted coarray parallelization of Fortran 2008. The coarray parallelization is known to be effective for simulation method with simple grid configurations such as LBM.

We have found that the parallelization by coarray is much easier than that by MPI, which is widely used these days. We have also found that the parallelized code with coarray is much more concise and easy-to-read, compared with MPI-codes.

Conducting three quantitative tests, we have confirmed that calculation results by the LBM code developed in this study coincide well with analytical values.