Draft:Pore doublet flow
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In two phase flow, pore doublet flow refers to a simple network with two connected capillaries, usually comprises of a feeding channel that supplies the displacing fluid, two capillary tubes that bifurcate from point A and reunite downstream at point B, and an exit channel that converges the two bifurcated channel. The pore doublet is initially filled with one fluid, e.g. air, and then the air is displaced by the injecting fluid, e.g. water at the inlet of the feeding channel.
This problem is first demonstrated an semi-analytical solution in 2021[1]. The concept of preferential capillary number is proposed along with the viscosity ratio are used to charaterize the interface breakthrough preference in the pore doublet. Later, the full analytical formula for the evolution of the two-phase interface is put forward[2], now become a benchmark case to validate the numerical accuracy of computational scheme for two phase interface movement.
References
[edit]- ^ Gu, Qingqing; Liu, Haihu; Wu, Lei (2021-05-25). "Preferential imbibition in a dual-permeability pore network". Journal of Fluid Mechanics. 915. doi:10.1017/jfm.2021.174. ISSN 0022-1120.
- ^ "Optimal displacement of immiscible two-phase fluids in a pore doublet". Physics of Fluids. 35 (5). 2023-05-01. doi:10.1063/5.0149182. ISSN 1070-6631.