Dynamic wetting behavior of a triple-phase contact line in several experimental systems

Katoh, Kenji; Wakimoto, Tatsuro; Yamamoto, Yasufumi; Ito, Takahiro

doi:10.1016/j.expthermflusci.2014.05.006

Cited by 31 publications

(14 citation statements)

References 21 publications

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“…Although the triple line has a motion during dissolution, it is too slow to be recognized as dynamic contact angle, because the dynamic parameters appear for capillary numbers higher than 10 −4 (capillary number is ratio of viscous forces to interfacial forces of surface and show the dominancy of these forces). Such high capillary numbers is typically observed when the triple line motion on solid is faster than 0.1 mm/s [36]. The rate of triple line movement on the substrate due to the shrinkage of bubble is much less than this number for all the tests.…”

Section: Resultsmentioning

confidence: 87%

Variation of Contact Angles in Brine/CO₂/Mica System considering Short-Term Geological CO₂ Sequestration Condition

Jafari

Jung

2018

Geofluids

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Geological CO2 sequestration has been proposed as an effective solution to mitigate excessive human-emitted CO2 in atmosphere. Knowledge of immiscible two-phase flow of CO2-water/brine is necessary to evaluate the efficiency and safety of geological storage sites. Among forces dominating fluid flow, capillary pressure is highly important because of high uncertainty in measurement due to ambiguous wettability behavior of geomaterials. In particular, time-dependent wettability of geomaterials is of interest for predicting short-term performance of the storage site. After injection of CO2 into an aquifer, both the CO2 and water/brine in rocks pores are unsaturated and tend to dissolve into each other. Present study investigates the variation of contact angle on mica sheet using a captive bubble method at a wide range of pressures and salinities under unsaturated condition. Our results showed a general increase of contact angle with time. Comparison of unsaturated contact angle with previous results in the literature showed a wide span of wettability behavior, ranging from receding to advancing contact angle values reported in the literature. The observed decrease in wettability by time due to heterogeneity and pinning effect of triple line can jeopardize the safety of geological carbon sequestration projects in short-term after injection of CO2.

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Section: Resultsmentioning

confidence: 87%

Variation of Contact Angles in Brine/CO₂/Mica System considering Short-Term Geological CO₂ Sequestration Condition

Jafari

Jung

2018

Geofluids

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“…When the meniscus breaks, the contact angle θ θ A can be observed because of the dynamic wetting effect. 28,29 We then obtained α min , where the system energy E takes the minimum value under the condition of θ θ A using Eq. 9,…”

Section: A Residual Bubble Volume In Quasi-static Penetrationmentioning

confidence: 99%

“…When U is increased, the effect of dynamic wetting could not be neglected, and the model needs to include the effect of the dynamic contact angle. 28,29 The influence of the dynamic contact angle will be further discussed in Sec. IV C.…”

Section: A Trajectory Of the Contact Line And Rupture Time Of The Mementioning

confidence: 99%

Residual bubble volume formed behind a sphere plunging into liquid bath (meniscus breakdown with finite velocity of sphere penetration)

et al. 2018

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The residual bubble formed from spherical particles plunging into a liquid bath has an important effect on the performance of CaO particles used for the desulfurization of melted iron. Previous work has theoretically estimated the residual bubble volume resulting from quasi-static sphere immersion by applying the energy minimization principle to the gas-liquid interface meniscus at its rupture [Katoh et al., "Residual bubble formed behind a sphere plunging into liquid bath (in Japanese)," Jpn. J. Multiphase Flow 28, 547-553 (2015)]. Here, we propose a method to theoretically estimate the residual bubble volume for sphere penetration with a finite velocity from 0.05 to 30 mm/s into a liquid bath. To do so, the meniscus rupture at the sphere's critical depth was calculated via a dynamic equation in which the energy gradient along the sphere surface was considered as the driving force to move the triple-phase contact line. The bubble volume was then estimated by calculating the system energy at the meniscus breakpoint and by using the principle of minimum energy. The model results were verified experimentally for a variety of liquids, showing that the proposed model can be used for estimation of the residual bubble volume.

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“…(1) The ambient temperature was recorded and the value was stable for a given experiment and varied in the range [23][24][25][26] o C between experiments. The variation in viscosity from the temperature variation was confirmed using rheology measurements to be less than 5% of the values at 25° C.…”

Section: Experimental Methodsmentioning

confidence: 99%

Capillary Penetration into Inclined Circular Glass Tubes

et al. 2016

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The spontaneous penetration of a wetting liquid into a vertical tube against the force of gravity and the imbibition of the same liquid into a horizontal tube (or channel) are both driven by capillary forces and described by the same fundamental equations. However, there have been few experimental studies of the transition from one orientation to the other. We report systematic measurements of capillary penetration of polydimethylsiloxane oils of viscosities 9.6, 19.2 and 48.0 mPas into glass capillary tubes. We first report the effect of tube radii R between 140 µm and 675 µm on the dynamics of spontaneous imbibition We show that the data can be fitted using the exact numerical solution to the governing equations and that these are similar to fits using the analytical visco-gravitational approximation. However, larger diameter tubes show a rate of penetration slower than expected using an equilibrium contact angle and the known value of liquid viscosity. To account for the slowness, an increase in viscosity by a factor (η/ρ) scaling is needed. We show full agreement with theory requires the ratio R/κ

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Dynamic wetting behavior of a triple-phase contact line in several experimental systems

Cited by 31 publications

References 21 publications

Variation of Contact Angles in Brine/CO₂/Mica System considering Short-Term Geological CO₂ Sequestration Condition

Variation of Contact Angles in Brine/CO₂/Mica System considering Short-Term Geological CO₂ Sequestration Condition

Residual bubble volume formed behind a sphere plunging into liquid bath (meniscus breakdown with finite velocity of sphere penetration)

Capillary Penetration into Inclined Circular Glass Tubes

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Dynamic wetting behavior of a triple-phase contact line in several experimental systems

Cited by 31 publications

References 21 publications

Variation of Contact Angles in Brine/CO2/Mica System considering Short-Term Geological CO2 Sequestration Condition

Variation of Contact Angles in Brine/CO2/Mica System considering Short-Term Geological CO2 Sequestration Condition

Residual bubble volume formed behind a sphere plunging into liquid bath (meniscus breakdown with finite velocity of sphere penetration)

Capillary Penetration into Inclined Circular Glass Tubes

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Variation of Contact Angles in Brine/CO₂/Mica System considering Short-Term Geological CO₂ Sequestration Condition

Variation of Contact Angles in Brine/CO₂/Mica System considering Short-Term Geological CO₂ Sequestration Condition