DOI: 10.1002/2014GL062570
论文题名: Unifying the relative hindered velocity in suspensions and emulsions of nondeformable particles
作者: Faroughi S.A. ; Huber C.
刊名: Geophysical Research Letters
ISSN: 0094-9068
EISSN: 1944-8799
出版年: 2015
卷: 42, 期: 1 起始页码: 53
结束页码: 59
语种: 英语
英文关键词: bubble hindered rising
; crystal hindered settling
; Hindrance effect
; multiparticle system dynamics
; multiphase dynamics
; suspensions and emulsions
Scopus关键词: Single crystals
; Velocity
; Viscosity
; bubble hindered rising
; Emulsions and suspensions
; Hindered settling
; Hindrance effect
; Multi-particle systems
; Non-local interactions
; Particle volume fractions
; Quantitative modeling
; Suspensions (fluids)
; Brownian motion
; creep
; emulsion
; fluid flow
; magma
; rheology
; viscosity
英文摘要: Although the relative velocity of a single crystal or bubble in a quiescent fluid (melt) is well characterized, the interplay of crystals/bubbles in multiparticle systems and its effect on their settling/rising velocity is poorly quantified. We propose a theoretical model for the hindered velocity of non-Brownian emulsions and suspensions of nondeformable fluid and solid particles in the creeping flow regime. The model is based on three sets of correction: two on the drag coefficient experienced by each particle to account for both return flow and Smoluchowski effects and a correction on the rheology to account for nonlocal interactions introduced as a mean-field effective viscosity. Our model is tested against new and published experimental data over a wide range of particle volume fraction and viscosity ratio between the fluids. We find an excellent agreement between our model and experiments. The model is then applied to show that hindered settling can increase mineral residence time by up to an order of magnitude in convecting magma chambers. Key Points Hindered velocity in suspensions/emulsions A quantitative model for crystal settling and bubble rising in magma bodies Increase in crystals' residence time in magma due hindrance ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921787980&doi=10.1002%2f2014GL062570&partnerID=40&md5=dd0001f1492a1a936725a149e8990ffe
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8684
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Civil and Environmental Engineering, Georgia Institutive of Technology, Atlanta, GA, United States
Recommended Citation:
Faroughi S.A.,Huber C.. Unifying the relative hindered velocity in suspensions and emulsions of nondeformable particles[J]. Geophysical Research Letters,2015-01-01,42(1).