An adaptive mesh refinement-multiphase lattice Boltzmann flux solver for simulation of complex binary fluid flows

An adaptive mesh refinement-multiphase lattice Boltzmann flux solver for simulation of complex binary fluid flows
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用于模拟复杂二元流体流动的自适应网格细化-多相格玻尔兹曼通量求解器

DOI:
10.1063/1.5007232
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发表时间:
2017-12
期刊:
影响因子:
4.6
通讯作者:
Chang Shu
Chang Shu
中科院分区:
工程技术2区
文献类型:
--
作者:
Hai-Zhuan Yuan;Yan Wang;Chang Shu

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本文提出了一种自适应网格加密-多相格子Boltzmann通量求解器(AMR-MLBFS),以有效地模拟大密度比下的复杂二元流体流动。在该方法中,AMR算法提出了通过引入一个简单的指示符的根块网格细化和两个可能的状态,为每个块。与通过同时产生或移除四个子块来细化其网格的可用块结构AMR方法不同,本方法能够在细化指示符被触发时通过独立地产生或移除一到四个子块来局部细化其网格。因此,AMR网格在这项工作中使用,可以更集中在相界面附近的流动区域,其尺寸进一步减少。在每个网格块中,最近提出的MLBFS用于流场的解决方案和水平集方法用于捕获流体界面。与已有的AMR格子Boltzmann模型相比,该方法避免了传统方法的局限性。
This paper presents an adaptive mesh refinement-multiphase lattice Boltzmann flux solver (AMR-MLBFS) for effective simulation of complex binary fluid flows at large density ratios. In this method, an AMR algorithm is proposed by introducing a simple indicator on the root block for grid refinement and two possible statuses for each block. Unlike available block-structured AMR methods, which refine their mesh by spawning or removing four child blocks simultaneously, the present method is able to refine its mesh locally by spawning or removing one to four child blocks independently when the refinement indicator is triggered. As a result, the AMR mesh used in this work can be more focused on the flow region near the phase interface and its size is further reduced. In each block of mesh, the recently proposed MLBFS is applied for the solution of the flow field and the level-set method is used for capturing the fluid interface. As compared with existing AMR-lattice Boltzmann models, the present method avoids bo...
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