2011年
High-performance simulations of colliding inertia-particles in isotropic turbulence
Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
- ,
- ,
- 巻
- 77
- 号
- 782
- 開始ページ
- 1879
- 終了ページ
- 1891
- 記述言語
- 日本語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1299/kikaib.77.1879
This study develops an efficient parallel simulation of colliding particles in stationary isotropic turbulence. Flow is computed with a fourth-order finite-difference method and particles are tracked with the Lagrangian method. Particle collisions are efficiently detected by the cell-index method, which is often used in molecular dynamics simulations. The developed code is written in Fortran 90 in conjunction with MPI library. Auto-parallelization directives are inserted in the code for shared-memory parallelization, making it possible to run the code in the so-called hybrid-parallelization mode. The code is designed to minimize the MPI communication, which results in a high parallel performance. The present simulation has been run on up to 512 3 grids with 10 million particles. The largest simulation has successfully obtained the collision frequencies for the Taylor-scale-based Reynolds number, Re γ, of 209, which is much larger than previously attained maximum Rs γ of 85 in particle collision simulations. The collision frequencies obtained in this study have shown that a collision frequency model underestimates the frequency in high Re γ flows. © 2011 The Japan Society of Mechanical Engineers.
- リンク情報
- ID情報
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- DOI : 10.1299/kikaib.77.1879
- ISSN : 0387-5016
- SCOPUS ID : 84859621655