Numerical study of the effect of tortuosity and mixed wettability on spontaneous imbibition in heterogeneous porous media

Spontaneous imbibition in porous media plays an important role in numerous industrial processes, but its underlying mechanisms are still poorly understood due to the complicated structure and multiple surface properties of natural porous media. In order to ﬁll this gap, a quasi-three-dimensional col...

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Autores principales:	Zhenhan Diao, Sheng Li, Wei Liu, Haihu Liu, Qingfeng Xia
Formato:	article
Lenguaje:	EN
Publicado:	Yandy Scientific Press 2021
Materias:	spontaneous imbibition tortuosity mixed wettability quasi-3d simulation heterogeneous micromodel Physics QC1-999
Acceso en línea:	https://doaj.org/article/554d98d91488426c9b469520edc69bff
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spelling	oai:doaj.org-article:554d98d91488426c9b469520edc69bff2021-11-08T02:57:14ZNumerical study of the effect of tortuosity and mixed wettability on spontaneous imbibition in heterogeneous porous media10.46690/capi.2021.03.022652-3310https://doaj.org/article/554d98d91488426c9b469520edc69bff2021-09-01T00:00:00Zhttps://www.yandy-ager.com/index.php/cap/article/view/355https://doaj.org/toc/2652-3310Spontaneous imbibition in porous media plays an important role in numerous industrial processes, but its underlying mechanisms are still poorly understood due to the complicated structure and multiple surface properties of natural porous media. In order to ﬁll this gap, a quasi-three-dimensional color-gradient lattice Boltzmann model is applied to simulate the spontaneous imbibition in heterogeneous porous media micromodels, where the inﬂuence of viscosity ratio, tortuosity and mixed wettability is systematically investigated. Results show that the tortuosity has less inﬂuence on imbibition than the viscosity ratio, which leads to unstable displacement for viscosity ratios smaller than unity and to stable displacement for viscosity ratios greater than unity. By establishing the power-law relationship between wetting ﬂuid saturation and time, it is found that the scaling exponent is not only affected by tortuosity, but also related to pore throat structure of the micromodel. In addition, the mixed wettability is found to signiﬁcantly inﬂuence the stability of displacement, especially when the contact angle difference of two constituents is large. Speciﬁcally, the greater the mixing degree of two wettabilities, the more unstable the displacement will become, which results in an enhanced interface roughening. Accordingly, the scaling exponent deviates more from the prediction from the Lucas-Washburn equation. Due to the reduced connectivity of ﬂow paths, the wetting ﬂuid imbibition rate in mixed wettability condition is lower than that in uniform wettability condition, no matter whether the latter theoretically corresponds to a slow displacement or not.Zhenhan DiaoSheng LiWei LiuHaihu LiuQingfeng XiaYandy Scientific Pressarticlespontaneous imbibitiontortuositymixed wettabilityquasi-3d simulationheterogeneous micromodelPhysicsQC1-999ENCapillarity, Vol 4, Iss 3, Pp 50-62 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	spontaneous imbibition tortuosity mixed wettability quasi-3d simulation heterogeneous micromodel Physics QC1-999
spellingShingle	spontaneous imbibition tortuosity mixed wettability quasi-3d simulation heterogeneous micromodel Physics QC1-999 Zhenhan Diao Sheng Li Wei Liu Haihu Liu Qingfeng Xia Numerical study of the effect of tortuosity and mixed wettability on spontaneous imbibition in heterogeneous porous media
description	Spontaneous imbibition in porous media plays an important role in numerous industrial processes, but its underlying mechanisms are still poorly understood due to the complicated structure and multiple surface properties of natural porous media. In order to ﬁll this gap, a quasi-three-dimensional color-gradient lattice Boltzmann model is applied to simulate the spontaneous imbibition in heterogeneous porous media micromodels, where the inﬂuence of viscosity ratio, tortuosity and mixed wettability is systematically investigated. Results show that the tortuosity has less inﬂuence on imbibition than the viscosity ratio, which leads to unstable displacement for viscosity ratios smaller than unity and to stable displacement for viscosity ratios greater than unity. By establishing the power-law relationship between wetting ﬂuid saturation and time, it is found that the scaling exponent is not only affected by tortuosity, but also related to pore throat structure of the micromodel. In addition, the mixed wettability is found to signiﬁcantly inﬂuence the stability of displacement, especially when the contact angle difference of two constituents is large. Speciﬁcally, the greater the mixing degree of two wettabilities, the more unstable the displacement will become, which results in an enhanced interface roughening. Accordingly, the scaling exponent deviates more from the prediction from the Lucas-Washburn equation. Due to the reduced connectivity of ﬂow paths, the wetting ﬂuid imbibition rate in mixed wettability condition is lower than that in uniform wettability condition, no matter whether the latter theoretically corresponds to a slow displacement or not.
format	article
author	Zhenhan Diao Sheng Li Wei Liu Haihu Liu Qingfeng Xia
author_facet	Zhenhan Diao Sheng Li Wei Liu Haihu Liu Qingfeng Xia
author_sort	Zhenhan Diao
title	Numerical study of the effect of tortuosity and mixed wettability on spontaneous imbibition in heterogeneous porous media
title_short	Numerical study of the effect of tortuosity and mixed wettability on spontaneous imbibition in heterogeneous porous media
title_full	Numerical study of the effect of tortuosity and mixed wettability on spontaneous imbibition in heterogeneous porous media
title_fullStr	Numerical study of the effect of tortuosity and mixed wettability on spontaneous imbibition in heterogeneous porous media
title_full_unstemmed	Numerical study of the effect of tortuosity and mixed wettability on spontaneous imbibition in heterogeneous porous media
title_sort	numerical study of the effect of tortuosity and mixed wettability on spontaneous imbibition in heterogeneous porous media
publisher	Yandy Scientific Press
publishDate	2021
url	https://doaj.org/article/554d98d91488426c9b469520edc69bff
work_keys_str_mv	AT zhenhandiao numericalstudyoftheeffectoftortuosityandmixedwettabilityonspontaneousimbibitioninheterogeneousporousmedia AT shengli numericalstudyoftheeffectoftortuosityandmixedwettabilityonspontaneousimbibitioninheterogeneousporousmedia AT weiliu numericalstudyoftheeffectoftortuosityandmixedwettabilityonspontaneousimbibitioninheterogeneousporousmedia AT haihuliu numericalstudyoftheeffectoftortuosityandmixedwettabilityonspontaneousimbibitioninheterogeneousporousmedia AT qingfengxia numericalstudyoftheeffectoftortuosityandmixedwettabilityonspontaneousimbibitioninheterogeneousporousmedia
_version_	1718443002693681152

Numerical study of the effect of tortuosity and mixed wettability on spontaneous imbibition in heterogeneous porous media

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