Fully threaded tree algorithms for adaptive refinement fluid dynamics simulations

doi:10.1006/jcph.1998.9998

1998-07-01

263

PRE

Khokhlov, AM

DOI：10.1006/jcph.1998.9998

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摘要

En 中文

描述了用于规则网格的自适应网格细化 (AMR) 的全线程树 (FTT)。通过使用在所有级别上穿线的树，避免了用于寻找最近邻居的树遍历。包括树修改在内的树上的所有操作都是O(N)，其中N是单元的数量，并且可以是并行形成的pel。树的实现需要2N个单词的内存，本文将FTT应用于流体动力学的Euler方程的积分。树上的集成可以利用用于网格的Bur评估算法，但是需要不同的时间步长策略才能提高计算效率。描述了一种自适应网格时间步进算法，其中在树的不同级别使用不同的时间步长，交错进行时间步进和网格细化，以避免在移动冲击之前需要大量的细网格缓冲层。描述了一种用于在网格细化过程中去除高频噪声的滤波算法。给出了测试示例，并评估了FTT性能。（C）1998学术出版社。

Keyword:

MESH REFINEMENT

EULER EQUATIONS

SHOCK-WAVES

GRIDS

期刊

Journal of Computational Physics

IF:

3.8

论文数:

1.6W

被引数:

7.4W

机构

暂无机构信息

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