Capillary rise with meniscus evaporation for Kn?0.01

Kuz'mich, A. V.; Novikova, V. I.

doi:10.1007/bf00871263

Cited by 3 publications

(3 citation statements)

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“…There is an additional aspect of the dynamics of capillary rise that deserve to be investigated to a greater detail: when chemical and physical properties at different temperatures affect the overall dynamics. Temperature substantially affects the surface tension at the gas-liquid and liquid-liquid interfaces [12], the mass exchange between the gas and liquid phases (e.g., evaporation) [13], the density and viscosity of the fluids, and the contact angle [14,15]. In instances where these quantities scale nonlinearly with the temperature, a nontrivial balance between conservative and nonconservative forces may result at different temperatures.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of capillary dynamics: A multiphase and multicomponent adiabatic approach

Maggi

Alonso‐Marroquín

2013

Phys. Rev. E

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We present an analysis of the effect of the temperature on the flow of multiphase systems made of multiple miscible components in uniform cylindrical capillaries in adiabatic conditions. The temperature was explicitly included in the dynamic contact angle, tension at the three-phase contact line, and densities and viscosities of the fluids. The mathematical framework accounted for conservative forces (gravity, inertial, and interfacial tensions), nonconservative forces (viscous dissipation), and fluid retardation effects in the reservoirs at the two capillary ends. Temperature-dependent flow regimes ranged from nonoscillatory to oscillatory in a two-phase binary liquid (water-ethanol) system and in a two-phase pure liquid (ether) system. The Ca-Bo orbits highlighted dynamic attractors that depended on specific system characteristics as well as temperature. We conclude that temperature alone expresses and important role in the dynamical characteristics of capillary rise flow around its equilibrium.

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Section: Introductionmentioning

confidence: 99%

Temperature dependence of capillary dynamics: A multiphase and multicomponent adiabatic approach

Maggi

Alonso‐Marroquín

2013

Phys. Rev. E

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“…The observed oscillatory motion by Kuz'mich and Novikova [93] was noted to be dependent upon the capillary radius and attributed to changes in the wetting angle.…”

Section: Meniscus Dynamicsmentioning

confidence: 94%

“…While not principally studying the meniscus dynamics, the experimental study performed by Kuz'mich and Novikova [93] investigated the static height of an evaporating meniscus as a function of capillary radius and capillary tube length. The study made only a qualitative mention as to the dynamic aspect of the meniscus motion.…”

Section: Meniscus Dynamicsmentioning

confidence: 99%

An Experimental and Theoretical Investigation of Evaporating Meniscus Dynamics and Instabilities

Polansky¹

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High power density systems utilising phase change heat transfer devices such as heat pipes can be susceptible to evaporation driven meniscus dynamics and instability.To better understand this, an study of evaporating meniscus dynamics and instability was needed. A mathematical model describing evaporating meniscus dynamics was developed in which meniscus height was correlated with superheat. Subsequent validation experiments confirmed the model was consistent with the general trends including the superheat to meniscus height relation.The study of evaporating meniscus instability was investigated using a one-sided model and a linear stability analysis. The analysis considered the effects of long range molecular forces, surface tension, vapour recoil, evaporation, thermocapillarity and viscous forces. The potential for instability was studied for three film geometries, for which the potential for instability was found to be spatially dependent for the curved cases, with perturbation growth rates increasing with superheat.An experimental study of channel based evaporating meniscus instability was performed for eight channel widths and three fluids: n-pentane, iso-octane and acetone.The meniscus height to superheat correlation was used to infer the superheat at which the meniscus destabilised. The experiments revealed two kinds of instability. The first was localised to a narrow range of superheats and unique to the alkanes, the second common to all three fluids and sustained for higher superheats. The second kind of instability was found to require larger superheats for decreasing channel widths.

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An experimental and numerical study of capillary rise with evaporation

Polansky

Kaya

2015

International Journal of Thermal Sciences

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Capillary rise with meniscus evaporation for Kn?0.01

Cited by 3 publications

References 1 publication

Temperature dependence of capillary dynamics: A multiphase and multicomponent adiabatic approach

Temperature dependence of capillary dynamics: A multiphase and multicomponent adiabatic approach

An Experimental and Theoretical Investigation of Evaporating Meniscus Dynamics and Instabilities

An experimental and numerical study of capillary rise with evaporation

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