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SPH simulation of selective withdrawal from microcavity
Zhou, Guangzheng1; Ge, Wei1; Li, Bo1,2; Li, Xipeng1,2; Wang, Peng1,2; Wang, Junwu1; Li, Jinghai1
2013-10-01
Source PublicationMICROFLUIDICS AND NANOFLUIDICS
Volume15Issue:4Pages:481-490
AbstractThe selective withdrawal of weakly compressible fluids is investigated by smoothed particle hydrodynamics (SPH) with a revised model of surface tension. In our model problem, fluid is withdrawn from a two-dimensional microcavity through a narrow outlet above the interface of two immiscible fluids. The outflow boundary is implemented by a particular zone of fluid particles with prescribed velocity, together with the introduction of artificial boundary particles. Based on the average number density of fluid particles, the effective contribution of boundary particles is corrected for the compressible context. It is found that there exists a critical withdrawal rate for each initial interface height, beyond which the lower phase becomes entrained in a thin spout along with the upper phase. Besides, the Froude number with redefinition for this kind of multiphase flow could serve as a criterion of flow behavior. Furthermore, larger surface tension, smaller dynamical viscosity and density of the upper phase all lead to longer threshold time of formation of the spout state, and thus are favorable to the withdrawal of upper phase both in terms of higher efficiency and larger quantity.
KeywordMultiphase Flow Microcavity Smoothed Particle Hydrodynamics Selective Withdrawal Surface Tension Outflow Boundary
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
Indexed BySCI
Language英语
WOS KeywordSMOOTHED PARTICLE HYDRODYNAMICS ; LIQUID 2-PHASE FLOW ; FREE-SURFACE FLOWS ; LOW-REYNOLDS-NUMBER ; NUMERICAL-SIMULATION ; SOLID FLOWS ; GAS ; MICROCHANNEL ; MODEL ; DISPLACEMENT
WOS Research AreaScience & Technology - Other Topics ; Instruments & Instrumentation ; Physics
WOS SubjectNanoscience & Nanotechnology ; Instruments & Instrumentation ; Physics, Fluids & Plasmas
WOS IDWOS:000324646000005
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13512
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.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Guangzheng,Ge, Wei,Li, Bo,et al. SPH simulation of selective withdrawal from microcavity[J]. MICROFLUIDICS AND NANOFLUIDICS,2013,15(4):481-490.
APA Zhou, Guangzheng.,Ge, Wei.,Li, Bo.,Li, Xipeng.,Wang, Peng.,...&Li, Jinghai.(2013).SPH simulation of selective withdrawal from microcavity.MICROFLUIDICS AND NANOFLUIDICS,15(4),481-490.
MLA Zhou, Guangzheng,et al."SPH simulation of selective withdrawal from microcavity".MICROFLUIDICS AND NANOFLUIDICS 15.4(2013):481-490.
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