Evaporation from an extended meniscus for nonisothermal interfacial conditions

Hallinan, Kevin P.; Chebaro, H.; Kim, S. J.; Chang, Won Soon

doi:10.2514/3.602

Cited by 74 publications

(37 citation statements)

References 14 publications

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“…The meniscus is superheated, and vapor space is assumed to consist of pure saturated vapor. The present model complements previous studies [3][4][5][6][7][8][9][10][11][12][13][14][15][16] in three ways. First, heat transfer in the thin-film and micro regions is quantitatively compared and the relative contributions of the two regions to the overall heat transfer delineated.…”

Section: Introductionsupporting

confidence: 73%

“…The model is often simplified in the literature by assuming a value of zero for δ' [6][7][8][9]. This term is retained in the present work to better model the beginning of the intrinsic meniscus where the slope may not be negligible.…”

Section: Thin-film Profilementioning

confidence: 99%

“…6 In the development thus far, T lv is unknown. However, it is noted that the evaporation heat flux on the interface is equal to the conduction heat flux through the thin film:…”

Section: Interfacial Mass Transportmentioning

confidence: 99%

“…The equations governing the thin-film profile have been extensively discussed in the literature [3][4][5][6][7][8][9] and are briefly reviewed here. The pressure difference between vapor and liquid at the liquid-vapor interface is due both to the capillary and disjoining pressures, and is expressed using the augmented Young-Laplace equation [4]:…”

Section: Thin-film Profilementioning

confidence: 99%

“…Schonberg et al [5] investigated the thin film by ignoring P c . Hallinan et al [6] and DasGupta et al [7] developed a fourth-order ordinary differential equation for solving the augmented Young-Laplace equation and obtained the thickness profile of the extended meniscus. The influence of superheat on the thin film profile was discussed.…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of an evaporating thin film in a microchannel

Wang

Garimella

Murthy

2007

International Journal of Heat and Mass Transfer

335

210

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An evaporating meniscus in a microchannel is investigated through an augmented Young-Laplace model and the kinetic theory-based expression for mass transport across a liquid-vapor interface. The complete expression for mass transport is employed without any approximations and boundary conditions for the film profile are developed. The thin-film and the intrinsic-meniscus regions are distinguished based on the disjoining pressure variation along the meniscus. While heat transfer in the thin-film region is found to be relatively insensitive to channels larger than a few micrometers in radius, that in the intrinsic meniscus is quite sensitive to channel size. The role of evaporation suppression due to capillary pressure in both regions is discussed. Compared to the relatively small contribution to overall heat transfer from the thin-film region, the micro region (defined here as extending from the non-evaporating region to a location where the film is 1 m thick) is found to account for more than 50% of the total heat transfer.

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Section: Introductionsupporting

confidence: 73%

Section: Thin-film Profilementioning

confidence: 99%

“…6 In the development thus far, T lv is unknown. However, it is noted that the evaporation heat flux on the interface is equal to the conduction heat flux through the thin film:…”

Section: Interfacial Mass Transportmentioning

confidence: 99%

Section: Thin-film Profilementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Characteristics of an evaporating thin film in a microchannel

Wang

Garimella

Murthy

2007

International Journal of Heat and Mass Transfer

335

210

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Intermolecular forces in phase‐change heat transfer: 1998 Kern award review

Wayner

1999

AIChE Journal

132

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Evaporation heat transfer of steady thin film in micro capillary tubes of micron scale

2002

Heat Trans. Asian Res.

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This paper reports that the heat transfer mechanism of phase change in a capillary tube belongs to liquid film conduction and surface evaporation. The surface evaporation is influenced by vapor temperature, vapor-liquid interfacial temperature, and vapor-liquid pressure difference. In the vapor-liquid flow mechanism, flow is effected by both the gradient of disjoining pressure, and the gradient of capillary pressure. The mechanism of vapor-liquid interaction consists of the shear stress caused by momentum transfer owing to evaporation, and frictional shear stress due to the velocity difference between vapor and liquid. In the model presented for a capillary tube, the heat transfer, vapor-liquid flow, and their interaction are more comprehensively considered. The thin film profile and heat transfer characteristics have close relations with a capillary radius and heat transfer power. The results of calculation indicate that the length of the evaporating interfacial region decreases to some extent with decreasing capillary radius and increasing heat transfer power.

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Evaporation from an extended meniscus for nonisothermal interfacial conditions

Cited by 74 publications

References 14 publications

Characteristics of an evaporating thin film in a microchannel

Characteristics of an evaporating thin film in a microchannel

Intermolecular forces in phase‐change heat transfer: 1998 Kern award review

Evaporation heat transfer of steady thin film in micro capillary tubes of micron scale

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