The influence of contact angle on capillary pressure–saturation relations in a porous medium including various liquids

İshakoğlu, Ali; Baytaş, A. Filiz

doi:10.1016/j.ijengsci.2004.05.007

Cited by 25 publications

(8 citation statements)

References 15 publications

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“…The effect of the contact angle is the most significant factor of hysteresis for many types of soils, particularly for soils with a relatively coarse texture. This assumption is in keeping with the discoveries of Wang et al [43], Likos and Lu [44], Moseley and Dhir [45], and Ishakoglu and Baytas [46].…”

Section: Hysteresissupporting

confidence: 76%

Soil–Water Retention Curves Derived as a Function of Soil Dry Density

Chen

2018

GeoHazards

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The soil–water retention curves (SWRC) of soil plays a key role in unsaturated soil mechanics, which is a relatively new field of study having wide applications particularly in geotechnical and geo-environmental engineering. SWRCs were used to evaluate the ability of unsaturated soils to attract water with various water contents and matric suctions. Drying and wetting SWRCs for a sandy soil with different dry densities were studied in a laboratory. Proton nuclear magnetic resonance, image processing technology, and mercury intrusion porosimetry were used to characterize the microscopic mechanisms of pore size distribution in the soil. Soil–water retention in the soil samples was strongly dependent on the dry density. With zero matric suction, soil samples with a higher dry density had a lower initial volumetric water content. Volumetric water content changed at a slower rate when values of matric suction increased in soils with a higher dry density. Soil samples had residual matric suction and a larger air-entry value with a smaller slope of the SWRC when they had a higher density. Dry density change is mainly responsible for the large pores. The number of large pores decreased as dry density increased. As the dry density increased, the area of macropores occupying the largest portion decreased, while the area of mesopores and micropores increased. Minipores accounted for the smallest proportion of total area and they were nearly constant. The proportion of large diameter pores decreased relative to pores with small diameters in the tested soils. The total pore volume was lower for soil specimens that had larger dry densities, as compared to relatively loose specimens. There was hysteresis between the drying and wetting curves for all soil samples. Hysteresis decreased as the dry density of the soil increased. The different liquid–solid contact angle was the main factor causing hysteresis of SWRC.

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Section: Hysteresissupporting

confidence: 76%

Soil–Water Retention Curves Derived as a Function of Soil Dry Density

Chen

2018

GeoHazards

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“…According to Anderson [], no simple relationship can be derived between capillary pressure and wettability. Even though some authors have observed an increase in capillary pressure for decreasing contact angles [e.g., Ishakoglu and Baytas , ], some others concluded that this evolution is not visible for all contact angles range, especially for drainage capillary pressure curves [e.g., Morrow , ]. Therefore, the results obtained for capillary pressure cannot be directly used to discuss potential wettability evolution of the rock sample.…”

Section: Discussion: Implication Of Changes Over Time On the Flow Parmentioning

confidence: 99%

Two‐phase flow properties of a sandstone rock for the CO₂/water system: Core‐flooding experiments, and focus on impacts of mineralogical changes

Manceau

Ma²,

Li³

et al. 2015

Water Resources Research

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The two-phase flow characterization (CO 2 /water) of a Triassic sandstone core from the Paris Basin, France, is reported in this paper. Absolute properties (porosity and water permeability), capillary pressure, relative permeability with hysteresis between drainage and imbibition, and residual trapping capacities have been assessed at 9 MPa pore pressure and 28 C (CO 2 in liquid state) using a single core-flooding apparatus associated with magnetic resonance imaging. Different methodologies have been followed to obtain a data set of flow properties to be upscaled and used in large-scale CO 2 geological storage evolution modeling tools. The measurements are consistent with the properties of well-sorted water-wet porous systems. As the mineralogical investigations showed a nonnegligible proportion of carbonates in the core, the experimental protocol was designed to observe potential impacts on flow properties of mineralogical changes. The magnetic resonance scanning and mineralogical observations indicate mineral dissolution during the experimental campaign, and the core-flooding results show an increase in porosity and water absolute permeability. The changes in two-phase flow properties appear coherent with the pore structure modifications induced by the carbonates dissolution but the changes in relative permeability could also be explained by a potential increase of the water-wet character of the core. Further investigations on the impacts of mineral changes are required with other reactive formation rocks, especially carbonate-rich ones, because the implications can be significant both for the validity of laboratory measurements and for the outcomes of in situ operations modeling.

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“…Considerable attention has recently focused on the development of theoretical SWCC models based on the Young-Laplace equation. Ishakoglu and Baytas (2005), Likos and Lu (2004), and Luan et al (2005) believed that the theoretical SWCC strongly depends on the contact angle. The contact angle, or specifically the water-air contact angle, is an intrinsic property of solid-liquid-air systems such as soils .…”

Section: Review Of Existing Methods For Fitting the Main Swccsmentioning

confidence: 99%

A Hysteretic Model Considering Contact Angle Hysteresis for Fitting Soil‐Water Characteristic Curves

Liao

Chai

et al. 2021

Water Resources Research

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The influence of contact angle on capillary pressure–saturation relations in a porous medium including various liquids

Cited by 25 publications

References 15 publications

Soil–Water Retention Curves Derived as a Function of Soil Dry Density

Soil–Water Retention Curves Derived as a Function of Soil Dry Density

Two‐phase flow properties of a sandstone rock for the CO₂/water system: Core‐flooding experiments, and focus on impacts of mineralogical changes

A Hysteretic Model Considering Contact Angle Hysteresis for Fitting Soil‐Water Characteristic Curves

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The influence of contact angle on capillary pressure–saturation relations in a porous medium including various liquids

Cited by 25 publications

References 15 publications

Soil–Water Retention Curves Derived as a Function of Soil Dry Density

Soil–Water Retention Curves Derived as a Function of Soil Dry Density

Two‐phase flow properties of a sandstone rock for the CO2/water system: Core‐flooding experiments, and focus on impacts of mineralogical changes

A Hysteretic Model Considering Contact Angle Hysteresis for Fitting Soil‐Water Characteristic Curves

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Two‐phase flow properties of a sandstone rock for the CO₂/water system: Core‐flooding experiments, and focus on impacts of mineralogical changes