当前位置: X-MOL 学术Water Resour. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A Dynamic Pore Network Model for Imbibition Simulation Considering Corner Film Flow
Water Resources Research ( IF 4.6 ) Pub Date : 2022-06-23 , DOI: 10.1029/2022wr032332
Jianlin Zhao 1 , Feifei Qin 1 , Qinjun Kang 2 , Chaozhong Qin 3, 4 , Dominique Derome 5 , Jan Carmeliet 1
Affiliation  

Wetting films can develop in the corners of angular pores under strong wetting conditions. Modeling the dynamics of corner film remains elusive using direct numerical simulations because of the significant scale difference between main meniscus and corner film flow. In this paper, the modified interacting capillary bundle model (ICB), developed in our previous work to describe accurately corner film dynamics in a single square tube, is incorporated into a single-pressure dynamic pore network model (DPNM) to simulate imbibition in strongly wetting porous media with corner film flow. The traditional pore network is decomposed into several layers of interacting subpore networks where the 0th layer of subpore network simulates the main meniscus flow and higher layers the corner film flow. The fluid flow between different layers is captured by interlayer throats. In addition, the snap-off mechanism caused by the thickening of wetting corner film is considered. The accuracy of the developed model is validated for four cases: spontaneous imbibition in a single square tube, wetting fluid redistribution through corner films under a capillary pressure difference, snap off in a narrow throat connecting two large pores, and imbibition dynamics in a real microfluidic porous geometry. The validated model is then used to simulate both spontaneous and controlled imbibition in a pore network with random pore size distribution. The interaction between corner film and main meniscus flow in porous media is analyzed from a pore-scale perspective.

中文翻译:

考虑角膜流动的渗吸模拟动态孔隙网络模型

在强润湿条件下,润湿膜可以在角孔的角落形成。由于主弯液面和角膜流之间存在显着的尺度差异,因此使用直接数值模拟对角膜的动力学进行建模仍然难以捉摸。在本文中,在我们之前的工作中开发的改进的相互作用毛细管束模型(ICB)被纳入到单压力动态孔隙网络模型(DPNM)中,以模拟强吸用角膜流润湿多孔介质。传统的孔隙网络被分解为几层相互作用的子孔隙网络,其中第 0 层子孔隙网络模拟主要弯月面流动,更高层模拟角膜流动。不同层之间的流体流动由层间喉道捕获。此外,还考虑了润湿角膜增厚引起的折断机制。所开发模型的准确性在四种情况下得到验证:单个方管中的自吸、毛细压力差下通过角膜的润湿流体重新分布、在连接两个大孔的狭窄喉道中折断以及真实微流体中的吸胀动力学多孔几何。然后使用经过验证的模型来模拟具有随机孔径分布的孔隙网络中的自发和受控吸入。从孔隙尺度的角度分析了多孔介质中角膜与主弯液面流动的相互作用。考虑了润湿角膜增厚引起的折断机理。所开发模型的准确性在四种情况下得到验证:单个方管中的自吸、毛细压力差下通过角膜的润湿流体重新分布、在连接两个大孔的狭窄喉道中折断以及真实微流体中的吸胀动力学多孔几何。然后使用经过验证的模型来模拟具有随机孔径分布的孔隙网络中的自发和受控吸入。从孔隙尺度的角度分析了多孔介质中角膜与主弯液面流动的相互作用。考虑了润湿角膜增厚引起的折断机理。所开发模型的准确性在四种情况下得到验证:单个方管中的自吸、毛细压力差下通过角膜的润湿流体重新分布、在连接两个大孔的狭窄喉道中折断以及真实微流体中的吸胀动力学多孔几何。然后使用经过验证的模型来模拟具有随机孔径分布的孔隙网络中的自发和受控吸入。从孔隙尺度的角度分析了多孔介质中角膜与主弯液面流动的相互作用。润湿流体在毛细压力差下通过角膜重新分布,在连接两个大孔的狭窄喉部中折断,并在真正的微流体多孔几何结构中进行吸收动力学。然后使用经过验证的模型来模拟具有随机孔径分布的孔隙网络中的自发和受控吸入。从孔隙尺度的角度分析了多孔介质中角膜与主弯液面流动的相互作用。润湿流体在毛细压力差下通过角膜重新分布,在连接两个大孔的狭窄喉部中折断,并在真正的微流体多孔几何结构中进行吸收动力学。然后使用经过验证的模型来模拟具有随机孔径分布的孔隙网络中的自发和受控吸入。从孔隙尺度的角度分析了多孔介质中角膜与主弯液面流动的相互作用。
更新日期:2022-06-23
down
wechat
bug