Abstract

In this study, the Shan Chen Lattice Boltzmann method (LBM) is implemented to simulate pore-scale physics of drying porous media. The pore-scale mechanisms responsible for multiphase fluid transport in drying porous media are revisited, and the physical effects such as capillary valve effect and Haines jumps are delineated. Fluctuations observed in drying rate curves are realized to be caused by Haines jumps during the fast invasion of the gas phase into the complex geometry of the pore space. Furthermore, it is observed that the fluctuations are significant in the initial period of drying and diminish as the drying front recedes into the porous medium. The observed fluctuations in drying rate curves render the inspiration to reconcile LBM and pore network model as a hybrid pore-scale technique to track the micro–macro interactions in drying porous media.

摘要

在这项研究中，采用Shan Chen格子Boltzmann方法（LBM）来模拟干燥多孔介质的孔尺度物理学。研究了在多孔多孔介质中负责多相流体传输的孔尺度机制，并描述了诸如毛细管阀效应和海恩斯跃迁等物理效应。在干燥速率曲线中观察到的波动被认为是由气相快速侵入气相复杂的孔隙空间期间的Haines跳跃引起的。此外，观察到，在干燥的初始阶段，波动是显着的，并且随着干燥前沿退回到多孔介质中而减小。