Climate Change Data Portal
DOI | 10.1016/j.advwatres.2020.103642 |
Unsaturated flow in a packing of swelling particles; a grain-scale model | |
Sweijen T.; Hassanizadeh S.M.; Chareyre B. | |
发表日期 | 2020 |
ISSN | 0309-1708 |
卷号 | 142 |
英文摘要 | In this work, a grain-scale modelling technique is introduced for the simulation of unsaturated flow in deforming and swelling granular materials. To do so, a pore-scale model for unsaturated flow is coupled to the discrete element method (DEM). It is assumed that initially a dry packing of particles is quickly invaded by a liquid and becomes fully saturated. Particles start absorbing the liquid and this causes a rearrangement of particles, entrance of air into the packing, and a redistribution of the liquid (i.e. unsaturated flow). Flow was computed using a scheme of implicit pressure solver and explicit saturation update (IMPES), whilst particle movement was modelled using DEM. Simulations are continued until the packing is dry again. This is the first time that such a pore-scale model has been developed. We have used the model to investigate unsaturated flow during drying of a bed of swelling particles. Results indicated that the characteristic time scales of unsaturated flow and water absorption determine the swelling behaviour of the particle packing. © 2020 |
关键词 | Finite difference methodGranular materialsLiquidsWater absorptionCharacteristic timeGrain-scale modelModelling techniquesParticle movementParticle packingsPore-scale modelSwelling behaviourUnsaturated flowsSwellingabsorptioncomputer simulationdiscrete element methodgranular mediumnumerical modelswellingunsaturated flow |
语种 | 英语 |
来源机构 | Advances in Water Resources |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/131766 |
推荐引用方式 GB/T 7714 | Sweijen T.,Hassanizadeh S.M.,Chareyre B.. Unsaturated flow in a packing of swelling particles; a grain-scale model[J]. Advances in Water Resources,2020,142. |
APA | Sweijen T.,Hassanizadeh S.M.,&Chareyre B..(2020).Unsaturated flow in a packing of swelling particles; a grain-scale model.,142. |
MLA | Sweijen T.,et al."Unsaturated flow in a packing of swelling particles; a grain-scale model".142(2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。