A test case for the simulation of three-dimensional variable-density flow and solute transport in discretely-fractured porous media
A test case for the simulation of three-dimensional variable-density flow and solute transport in discretely-fractured porous media
复制标题
离散裂缝多孔介质中三维变密度流动和溶质输运模拟的测试用例
DOI：
10.1016/j.advwatres.2008.07.003
复制
发表时间：
2008
影响因子：
4.7
通讯作者：
R. Therrien
中科院分区：
文献类型：
--
作者：
T. Graf;R. Therrien
一个测试用例已经开发的三维模拟离散裂隙多孔介质中的变密度流和溶质运移。模拟域是一个低渗透率的多孔基质立方体，包含一个单一的非平面裂缝。初始溶质浓度处处为零。一个恒定的溶质浓度被分配到域的顶部，这增加了近顶部的流体密度，并诱导向下的密度驱动流。因此，该测试案例与盐水处置池或废物储存库下方的浓盐水的下降流相当。许多手指和不同的对流细胞发展早期的断裂，但手指后来合并和对流变得不那么明显。为了帮助测试其他变密度流动和运输模型，测试案例的结果定性（浓度等值线和速度场）和定量（渗透深度，质量通量，总质量存储，最大裂缝和基质速度）。
A test case has been developed for three-dimensional simulations of variable-density flow and solute transport in discretely-fractured porous media. The simulation domain is a low-permeability porous matrix cube containing a single non-planar fracture. The initial solute concentration is zero everywhere. A constant solute concentration is assigned to the top of the domain, which increases near-top fluid density and induces downward density-driven flow. The test case is therefore comparable to downwelling of a dense brine below a saline disposal basin or a waste repository. Numerous fingers and distinct convection cells develop early in the fracture but the fingers later coalesce and convection becomes less apparent. To help test other variable-density flow and transport models, results of the test case are presented both qualitatively (concentration contours and velocity fields) and quantitatively (penetration depth, mass flux, total mass stored, maximum fracture and matrix velocity).