Discrepancy of simulating snap-off processes in 2D and 3D pore-throats

被引：9

作者：

He, Long ^{[1
]}

Han, Siming ^{[1
]}

Yuan, Yuejin ^{[1
]}

Yuan, Yueding ^{[2
]}

机构：

[1] Univ Sci & Technol, Coll Mech & Elect Engn, Xian 710021, Shaanxi, Peoples R China

[2] Hunan Univ Finance & Econ, Sch Math & Stat, Changsha 410205, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2022年 / 653卷

基金：

中国国家自然科学基金;

关键词：

Snap-off; 3D pore-throat; Droplet; Capillary pressure; 2-PHASE FLOW; NONWETTING FLUID; FOAM-GENERATION; POROUS-MEDIA; OIL DROPLETS; VOLUME; DYNAMICS; NANOPARTICLES; MECHANISMS;

D O I：

10.1016/j.colsurfa.2022.129978

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

3D pore-throats with uniform thickness were commonly used to explore snap-off processes in experimental studies, and always simplified as 2D areal models in simulation of snap-off processes. However, 3D effects of capillary force, viscous force and wall cannot be neglected. We assume that snap-off processes in 2D and 3D porethroats may exist discrepancy. Snap-off processes in both 2D and 3D pore-throats were simulated with various capillary numbers Ca, viscosity ratios mu r and size ratios M of throat and pore. The results showed: (1) snap-off was more prone to occur with the same M in 3D pore-throats due to the larger capillary pressure difference; (2) the increase of M inhibited occurrence of snap-off, and the inhibition effect of M was more obvious in 2D porethroats; (3) snap-off only occurred with M < 7/35 in 2D pore-throats, which was significant different from the Roof theory (M < 1/2). These findings indicate that 2D areal models are not suitable to simplify the 3D porethroat in simulating snap-off processes.

引用

页数：9

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