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Simulation of dynamic fluid-solid interactions with an improved direct-forcing immersed boundary method
Alternative TitleParticuology
Di, Shengbin1,2; Ge, Wei1
2015-02-01
Source PublicationPARTICUOLOGY
ISSN1674-2001
Volume18Issue:FEBPages:22-34
Abstract

Dynamic fluid-solid interactions are widely found in chemical engineering, such as in particle-laden flows, which usually contain complex moving boundaries. The immersed boundary method (IBM) is a convenient approach to handle fluid-solid interactions with complex geometries. In this work, Uhlmann's direct-forcing IBM is improved and implemented on a supercomputer with CPU-GPU hybrid architecture. The direct-forcing IBM is modified as follows: the Poisson's equation for pressure is solved before evaluation of the body force, and the force is only distributed to the Cartesian grids inside the immersed boundary. A multidirect forcing scheme is used to evaluate the body force. These modifications result in a divergence-free flow field in the fluid domain and the no-slip boundary condition at the immersed boundary simultaneously. This method is implemented in an explicit finite-difference fractional-step scheme, and validated by 2D simulations of lid-driven cavity flow, Couette flow between two concentric cylinders and flow over a circular cylinder. Finally, the method is used to simulate the sedimentation of two circular particles in a channel. The results agree very well with previous experimental and numerical data, and are more accurate than the conventional direct-forcing method, especially in the vicinity of a moving boundary. (C) 2014 Published by Elsevier B.V. on behalf of Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences.

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Dynamic fluid-solid interactions are widely found in chemical engineering, such as in particle-laden flows, which usually contain complex moving boundaries. The immersed boundary method (IBM) is a convenient approach to handle fluid-solid interactions with complex geometries. In this work, Uhlmann's direct-forcing IBM is improved and implemented on a supercomputer with CPU-GPU hybrid architecture. The direct-forcing IBM is modified as follows: the Poisson's equation for pressure is solved before evaluation of the body force, and the force is only distributed to the Cartesian grids inside the immersed boundary. A multidirect forcing scheme is used to evaluate the body force. These modifications result in a divergence-free flow field in the fluid domain and the no-slip boundary condition at the immersed boundary simultaneously. This method is implemented in an explicit finite-difference fractional-step scheme, and validated by 2D simulations of lid-driven cavity flow, Couette flow between two concentric cylinders and flow over a circular cylinder. Finally, the method is used to simulate the sedimentation of two circular particles in a channel. The results agree very well with previous experimental and numerical data, and are more accurate than the conventional direct-forcing method, especially in the vicinity of a moving boundary. (C) 2014 Published by Elsevier B.V. on behalf of Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences.

KeywordImmersed Boundary Method Fluid-solid Interactions No-slip Condition Divergence-free Condition Cpu-gpu Hybrid Architecture
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.partic.2014.05.004
URL查看原文
Indexed BySCI
Language英语
WOS KeywordNAVIER-STOKES EQUATIONS ; PARTICLE-LADEN FLOWS ; PARTICULATE FLOWS ; INTERFACE METHOD ; CYLINDER
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Chemical ; Materials Science, Multidisciplinary
WOS IDWOS:000349730200003
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11724
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Di, Shengbin,Ge, Wei. Simulation of dynamic fluid-solid interactions with an improved direct-forcing immersed boundary method[J]. PARTICUOLOGY,2015,18(FEB):22-34.
APA Di, Shengbin,&Ge, Wei.(2015).Simulation of dynamic fluid-solid interactions with an improved direct-forcing immersed boundary method.PARTICUOLOGY,18(FEB),22-34.
MLA Di, Shengbin,et al."Simulation of dynamic fluid-solid interactions with an improved direct-forcing immersed boundary method".PARTICUOLOGY 18.FEB(2015):22-34.
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