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Thickness-based adaptive mesh refinement methods for multi-phase flow simulations with thin regions
Chen XD(陈晓东); Yang V; Yang, V
Source PublicationJournal of Computational Physics
2014-03
Volume269Pages:22-39
ISSN0021-9991
AbstractIn numerical simulations of multi-scale, multi-phase flows, grid refinement is required to resolve regions with small scales. A notable example is liquid-jet atomization and subsequent droplet dynamics. It is essential to characterize the detailed flow physics with variable length scales with high fidelity, in order to elucidate the underlying mechanisms. In this paper, two thickness-based mesh refinement schemes are developed based on distance- and topology-oriented criteria for thin regions with confining wall/plane of symmetry and in any situation, respectively. Both techniques are implemented in a general framework with a volume-of-fluid formulation and an adaptive-mesh-refinement capability. The distance-oriented technique compares against a critical value, the ratio of an interfacial cell size to the distance between the mass center of the cell and a reference plane. The topology-oriented technique is developed from digital topology theories to handle more general conditions. The requirement for interfacial mesh refinement can be detected swiftly, without the need of thickness information, equation solving, variable averaging or mesh repairing. The mesh refinement level increases smoothly on demand in thin regions. The schemes have been verified and validated against several benchmark cases to demonstrate their effectiveness and robustness. These include the dynamics of colliding droplets, droplet motions in a microchannel, and atomization of liquid impinging jets. Overall, the thickness-based refinement technique provides highly adaptive meshes for problems with thin regions in an efficient and fully automatic manner. (C) 2014 Elsevier Inc. All rights reserved.
KeywordThickness-based Refinement Adaptive Mesh Refinement Digital Topology Volume-of-fluid Multi-phase Simulation
Subject Area流体力学 ; 计算流体力学
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Indexed BySCI
Language英语
WOS IDWOS:000335439300002
Funding OrganizationThis work was financially supported by the Army Research Office under the Multi-University Research Initiative under Contract No. W911NF-08-1-0124. The support and encouragement provided by Dr. Ralph Anthenien are gratefully acknowledged. Special thanks is due to Dr. Stephane Popinet for allowing us to use his work on the VOF and AMR algorithms in the Gerris code.
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/48830
Collection非线性力学国家重点实验室
Corresponding AuthorYang, V
Recommended Citation
GB/T 7714
Chen XD,Yang V,Yang, V. Thickness-based adaptive mesh refinement methods for multi-phase flow simulations with thin regions[J]. Journal of Computational Physics,2014,269:22-39.
APA Chen XD,Yang V,&Yang, V.(2014).Thickness-based adaptive mesh refinement methods for multi-phase flow simulations with thin regions.Journal of Computational Physics,269,22-39.
MLA Chen XD,et al."Thickness-based adaptive mesh refinement methods for multi-phase flow simulations with thin regions".Journal of Computational Physics 269(2014):22-39.
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