Vorobev Anatoliy, Prokopev Sergei, Lyubimova Tatyana
Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, U.K.
Tomsk Polytechnic University, Tomsk 634050, Russia.
Langmuir. 2021 Apr 27;37(16):4817-4826. doi: 10.1021/acs.langmuir.0c03633. Epub 2021 Apr 15.
We examine the dynamics of a miscible displacement in a capillary, calculating the nonequilibrium capillary pressure of a moving (and slowly diffusing) miscible meniscus. During the displacement, the capillary pressure varies with time following stretching and smearing of a miscible interface. The capillary pressure remains different from zero for a long time (on a diffusion time scale), slowing the displacement. This capillary pressure is however completely ignored by all theories currently available for practical modeling of miscible displacements in capillaries and porous matrices.
我们研究了毛细管中可混溶驱替的动力学，计算了移动（且扩散缓慢）的可混溶弯月面的非平衡毛细管压力。在驱替过程中，毛细管压力会随着可混溶界面的拉伸和涂抹随时间变化。在很长一段时间内（在扩散时间尺度上），毛细管压力都不为零，从而减缓了驱替过程。然而，目前所有用于毛细管和多孔基质中可混溶驱替实际建模的理论都完全忽略了这种毛细管压力。
