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Journal of Zhejiang University SCIENCE A
ISSN 1673-565X(Print), 1862-1775(Online), Monthly
2022 Vol.23 No.9 P.704-720
Influence of wettability in immiscible displacements with lattice Boltzmann method
Abstract: The role of wettability, often characterized by contact angle (θ), in two-phase immiscible phases displacement is not well understood. In this study, the color gradient lattice Boltzmann method (LBM), capable of maintaining the prescribed θ (from 0° to 180° at intervals of 10°) throughout the numerical simulations, was used to investigate the displacement patterns and displacement efficiency in a 2D porous medium. The capillary numbers (Ca) used were 0.01, 1, and 100, and the viscosity ratios (M) used were 0.1, 1, and 10. At M=10, the saturation (S) had a bilinear relationship with
Key words: Wettability; Porous media; Lattice Boltzmann method (LBM); Multiphase flow
机构:1浙江大学,建筑工程学院,岩土工程研究所,中国杭州,310058;2香港理工大学,土木与环境工程系,中国香港,九龙红磡;3忠北国立大学,土木工程学院,韩国忠北清州市,28644
目的:研究润湿性对于多孔介质驱替的影响,以提高驱替效率。
创新点:1.同时考虑了润湿性、毛细管数和粘滞比三者对驱替的影响并建立了三维相图;2.采用可以准确模拟接触角的边界条件算法,且模拟范围包含所有润湿性条件。
方法:采用格子波尔兹曼方法(LBM)对不同毛细管数-粘滞比组合下的19组接触角进行模拟,建立其与驱替形态和效率的影响。
结论:1.存在最优接触角使得击穿时的驱替效率最高;2.三维驱替相图包含了传统相图,反映了润湿性会使二维相图的驱替区域整体偏移。
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DOI:
10.1631/jzus.A2200047
CLC number:
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On-line Access:
2022-06-22
Received:
2022-01-24
Revision Accepted:
2022-05-26
Crosschecked:
2022-09-22