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Research Papers: Evaporation, Boiling, and Condensation

Evaporation Heat Transfer in Thin-Film Region With Bulk Vapor Flow Effect

[+] Author and Article Information
Benwei Fu

Institute of Marine Engineering
and Thermal Science,
College of Marine Engineering,
Dalian Maritime University,
Dalian 116026, China
e-mail: 845744877@qq.com

Nannan Zhao

Institute of Marine Engineering
and Thermal Science,
College of Marine Engineering,
Dalian Maritime University,
Dalian 116026, China
e-mail: znn@dlmu.edu.cn

Bohan Tian

Institute of Marine Engineering
and Thermal Science,
College of Marine Engineering,
Dalian Maritime University,
Dalian 116026, China
e-mail: tianbohan@163.com

Wilson Corey

Institute of Marine Engineering and
Thermal Science,
College of Marine Engineering,
Dalian Maritime University,
Dalian 116026, China
e-mail: cwilson9@gmail.com

Hongbin Ma

Department of Mechanical and
Aerospace Engineering,
University of Missouri,
Columbia, MO 65211
e-mail: mah@missouri.edu

1Corresponding author.

Presented at the 5th ASME 2016 Micro/Nanoscale Heat & Mass Transfer International Conference. Paper No. MNHMT2016-6619.Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received July 9, 2016; final manuscript received April 13, 2017; published online August 23, 2017. Assoc. Editor: Chun Yang.

J. Heat Transfer 140(1), 011502 (Aug 23, 2017) (8 pages) Paper No: HT-16-1451; doi: 10.1115/1.4037448 History: Received July 09, 2016; Revised April 13, 2017

An extra high evaporating heat transfer coefficient can be obtained by thin-film evaporation. In the current investigation, a new detailed mathematical model is developed by considering the effects of bulk flow and interfacial thermal resistance on fluid flow and heat transfer in the thin-film region of an evaporating meniscus. In addition to the interfacial thermal resistance occurring at the liquid–vapor interface, the pressure difference between liquid and vapor is considered to the bulk flow effect. The results show that the bulk flow, which depends on the pressure difference between the interfacial pressure and vapor pressure, significantly affects thin-film profile, heat flux distribution, interfacial temperature, meniscus radius, mass flow rate, and average flow velocity in the evaporating thin-film region. While the interfacial thermal resistance occurring at the liquid–vapor interface affects fluid flow and heat transfer in the evaporating thin-film region, the bulk flow effect is more important than the interfacial thermal resistance.

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References

Figures

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Fig. 1

Schematic of thin-film regions

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Fig. 2

Comparisons of thickness, heat flux, and interfacial temperature (the current model without the bulk flow effect and the results shown in Ref. 16)

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Fig. 3

Comparisons of film thickness (without bulk flow and with bulk flow)

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Fig. 4

Comparisons of heat flux (without bulk flow and with bulk flow)

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Fig. 5

Comparisons of interfacial temperature (without bulk flow and with bulk flow)

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Fig. 6

Comparisons of curvature (without bulk flow and with bulk flow)

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Fig. 7

Comparisons of mass flow rate (without bulk flow and with bulk flow)

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Fig. 8

Comparisons of average velocity (without bulk flow and with bulk flow)

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Fig. 9

Accommodation coefficient effect on film thickness

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Fig. 10

Accommodation coefficient effect on heat flux

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Fig. 11

Accommodation coefficient effect on interfacial temperature

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Fig. 12

Accommodation coefficient effect on curvature

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Fig. 13

Accommodation coefficient effect on mass flow rate

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Fig. 14

Accommodation coefficient effect on average velocity

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