气候变化领域集成服务门户(CCPortal): A spatially resolved fluid-solid interaction model for dense granular packs/soft-sand

CCPortal

DOI	10.1016/j.advwatres.2019.103454
	A spatially resolved fluid-solid interaction model for dense granular packs/soft-sand
	Gago P.A.; Raeini A.Q.; King P.
发表日期	2020
ISSN	0309-1708
卷号	136
英文摘要	Fluid flow through dense granular packs or soft sands can be described as a Darcy’ s flow for low injection rates, as the friction between grain-grain and grain-walls dominate the solid system behaviour. For high injection rates, fluid forces can generate grain displacement forming flow channels or “fractures”, which in turn modify local properties within the system, such as permeability and stress distribution. Due to this kind of “self organized” behaviour, a spatially resolved model for these interactions is required to capture the dynamics of these systems. In this work, we present a resolved model based on the approach taken by the CFDEM open source project which uses LIGGGHTS – a discrete elements method (DEM)– to model the granular behaviour and OpenFoam finite volume library for computational fluid dynamics (CFD), to simulate the fluid behaviour. The capabilities provided by the DEM engine allows the properties of the solid phase, such as inter-grain cohesion and solid confinement stress to be controlled. In this work the original solver provided by the CFDEM project was modified so as to deal with dense granular packs more effectively. Advantages of the approach presented are that it does not require external “scaling parameters” to reproduce well known properties of porous materials and that it inherits the performance provided by the CFDEM project. The model is validated by reproducing the well-known properties of static porous materials, such as its permeability as a function of the system porosity, and by calculating the drag coefficient for a sphere resting inside a uniform flow. Finally, we present fracture patterns obtained when modelling water injection into a Hele-Shaw cell, filled with a dense granular pack. © 2019
关键词	Fracture Porous materials Turbulent flow CFD-DEM CFDEM project Discrete elements method Fluid solid interaction Immersed boundary methods Open source projects Scaling parameter Spatially resolved Computational fluid dynamics computational fluid dynamics Darcy law discrete element method fluid flow granular medium permeability porosity sand
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/131873
推荐引用方式 GB/T 7714	Gago P.A.,Raeini A.Q.,King P.. A spatially resolved fluid-solid interaction model for dense granular packs/soft-sand[J]. Advances in Water Resources,2020,136.
APA	Gago P.A.,Raeini A.Q.,&King P..(2020).A spatially resolved fluid-solid interaction model for dense granular packs/soft-sand.,136.
MLA	Gago P.A.,et al."A spatially resolved fluid-solid interaction model for dense granular packs/soft-sand".136(2020).