DOI: 10.1002/2016GL070511
论文题名: Effect of hydrate nucleation mechanisms and capillarity on permeability reduction in granular media
作者: Kang D.H. ; Yun T.S. ; Kim K.Y. ; Jang J.
刊名: Geophysical Research Letters
ISSN: 0094-8701
EISSN: 1944-8432
出版年: 2016
卷: 43, 期: 17 起始页码: 9018
结束页码: 9025
语种: 英语
英文关键词: capillary effect
; hydrate
; lattice Boltzmann method
; nucleation
; permeability reduction
Scopus关键词: Capillarity
; Coatings
; Computational fluid dynamics
; Filling
; Grain size and shape
; Hydration
; Nucleation
; Pore size
; Sediments
; Capillary effects
; Grain size distribution
; Hydrate bearing sediments
; Hydrate nucleation
; Lattice Boltzmann flow
; Lattice Boltzmann method
; Permeability reduction
; Water permeability
; Hydrates
; bulk density
; capillarity
; flow measurement
; grain size
; granular medium
; hydration
; lattice dynamics
; nucleation
; permeability
; pore space
; saturation
; size distribution
; surface area
; tortuosity
; transition zone
英文摘要: A model for water permeability reduction in hydrate-bearing sediments is presented by considering capillary effect in hydrate nucleation. Both grain-coating and pore-filling cases are considered. The model is developed from a series of lattice Boltzmann flow simulations. Results show that the permeability decreases quasi-linearly with increasing hydrate saturation during grain-coating nucleation and that the permeability tends to be higher than predicted by previous analytical models, in which capillarity is not taken into account. The permeability follows unique reduction curve and is not so sensitive to initial sediment bulk density and grain size distribution. Simulations further show that there is a transition zone at Shyd = 0.3~0.4, where permeability reduction trend switches from grain-coating model to pore-filling model. Analyses of tortuosity and surface area confirm that the permeability reduction mechanisms result from pore-channel blocking in grain-coating case and pore size reduction in pore-filling case. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84987678255&doi=10.1002%2f2016GL070511&partnerID=40&md5=46d9d115102f657348f65f4f28e1e37e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9664
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: Graduate Student, Department of Civil and Environmental Engineering, Yonsei University, Seoul, South Korea
Recommended Citation:
Kang D.H.,Yun T.S.,Kim K.Y.,et al. Effect of hydrate nucleation mechanisms and capillarity on permeability reduction in granular media[J]. Geophysical Research Letters,2016-01-01,43(17).