粒子法による大規模津波遡上解析に向けた拡張スライスグリッド法

Translated title of the contribution: Expanding Slice Grid Method for Large Scale Tsunami Simulation Based on the Particle Method

仲矢 直樹, 浅井 光輝, 小笠原 圭太, 古市 幹人, 西浦 泰介

Research output: Contribution to journalArticle

Abstract

<p>When modeling the entire city with a highly detailed particle model, one must deal with an enormous number of degrees of freedom, and implementation of highly parallel calculation is indispensable. In this study, we developed a computational algorithm with high parallelization efficiency for the liquid spreading phenomenon over a flat plane problem, for later apply on tsunami run-up simulation. In particular, using a slice grid together with a dynamic load balancer as a method for dividing the domain, we propose an Expanding slice grid method to utilize maximum efficiency on memory utilization and computational speed. In this method, we gradually expand the analysis domain along with the fluid spreading. Finally, we measured the parallelization efficiency under highly parallel environment by calculation example. For the measurement, we used 256 and 4096 nodes of K computer. As a result, the calculation using 4096 nodes results in about 35 % efficiency compared with 256 nodes. It is necessary to further improve the efficiency by improving the program.</p>
Translated title of the contributionExpanding Slice Grid Method for Large Scale Tsunami Simulation Based on the Particle Method
Original languageJapanese
Pages (from-to)293
Journal計算力学講演会講演論文集
Volume2018
Issue number0
DOIs
Publication statusPublished - 2018

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