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Numerical Investigation on the Effects of a Precursor Wetting Film on the Displacement of Two Immiscible Phases Along a Channel

机译:前体润湿膜对通道中两个不混溶相位移影响的数值研究

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摘要

A set of numerical experiments has been conducted to study the effect of a precursor fluid layer on the motion of two phase system in a channel. This system is characterized by coupled Cahn-Hillard and Navier-Stokes system together with slip boundary conditions. The solution of the governing equation involves first the solution of Cahn-Hillard equation with semi-implicit and Mixed finite element discritization with a convex splitting scheme. The Navier-Stokes equations are then solved with a P2-P0 mixed finite element method. Three cases have been investigated; in the first the effect of different wettability scenarios with no precursor layer has been investigated. In the second scenario, the effect of the precursor layer for different wettability conditions is investigated. In the third case, the effect of the thickness of the precursor layer is investigated. It is found that, wettability conditions have considerable effect on the flow of the considered two-phase system. Furthermore the existence of the precursor layer has additional influence on the breakthrough of the phases.
机译:已经进行了一组数值实验,以研究前驱体流体层对通道中两相系统运动的影响。该系统的特点是结合了Cahn-Hillard和Navier-Stokes系统以及滑移边界条件。控制方程的解首先涉及具有半隐式和带有凸分裂方案的混合有限元离散化的Cahn-Hillard方程的解。然后用P2-P0混合有限元方法求解Navier-Stokes方程。调查了三起案件;首先,研究了没有前驱体层的不同润湿性方案的影响。在第二种情况下,研究了前体层对不同润湿性条件的影响。在第三种情况下,研究了前体层的厚度的影响。发现,润湿性条件对所考虑的两相系统的流动具有相当大的影响。此外,前体层的存在对相的突破具有附加影响。

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