A novel liquid bridge model for estimating SWCC and permeability of granular material

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	A novel liquid bridge model for estimating SWCC and permeability of granular material
	Wang XL(王晓亮); Li JC(李家春)
刊名	POWDER TECHNOLOGY
	2015-05
通讯作者邮箱	wangxiaoliang52086@126.com ; jcli05@imech.ac.cn
卷号	275 页码:121-130
关键词	Unsaturated granular materials Discrete element method Soil water characteristic curves Liquid bridge
ISSN号	0032-5910
通讯作者	Li, JC (reprint author), Chinese Acad Sci, Inst Mech, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
产权排序	[Wang, Xiaoliang; Li, Jiachun] Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China
中文摘要	As traditional liquid bridge model based on Yang-Laplace theory fails to model behaviors of unsaturated granular materials when liquid bridges fuse with each other in funicular and capillary regimes, a method called "Redistribution of Air Volume and Reduction of Liquid Bridge Force" is proposed, and incorporated into the original discrete element method to resolve this issue. Both soil water characteristic curve and suction stress characteristic curve are worked out by the modified discrete element method, the results of which coincide with theoretical solutions for simple cubic packing and tetrahedral packing of granular materials. Furthermore, parameter study shows that soil water characteristic curve depends on effective particle diameter, particle size distribution and packing density. Typical soil water characteristic curves of sand and silt are obtained using the modified method, with a trend similar to that of experiment qualitatively. With the help of Mualem model and Kozeny-Carman equation, permeability is also predicated for granular materials. In particular, the air entry value coincides with or close to those of typical sand and silt in magnitude. Finally, a case study of SWCC prediction for sandy soil is implemented with acceptable results. We may conclude that the modified discrete element method is capable of predicting hydraulic properties of granular materials qualitatively and semi-quantitatively. (C) 2015 Published by Elsevier B.V.
学科主题	Engineering, Chemical
分类号	二类/Q2
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	PARTICLE-SIZE DISTRIBUTION ; DISCRETE ELEMENT METHOD ; UNSATURATED SOILS ; HYDRAULIC CONDUCTIVITY ; ROLLING RESISTANCE ; CHARACTERISTIC CURVE ; SUCTION STRESS ; SHEAR-STRENGTH ; DEM ANALYSES ; CAPILLARY
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1016/j.powtec.2015.01.044
语种	英语
WOS记录号	WOS:000351801300014
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/49918]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
推荐引用方式 GB/T 7714	Wang XL,Li JC. A novel liquid bridge model for estimating SWCC and permeability of granular material[J]. POWDER TECHNOLOGY,2015,275:121-130.
APA	王晓亮,&李家春.(2015).A novel liquid bridge model for estimating SWCC and permeability of granular material.POWDER TECHNOLOGY,275,121-130.
MLA	王晓亮,et al."A novel liquid bridge model for estimating SWCC and permeability of granular material".POWDER TECHNOLOGY 275(2015):121-130.