This paper presents fundamental research on the hydrodynamics and heat transfer surrounding a single elongated bubble during flow boiling in a circular microchannel. A continuum surface force (CSF) model based on the volume of fluid (VOF) method is combined with the thermocapillary force to explore the effects of thermocapillarity for flow boiling in microchannels. To validate the self-defined codes, a two-phase thermocapillary-driven flow and a Taylor bubble growing in a capillary tube are studied. Results of both test cases show good convergence and agreement with data from the earlier literature. The bubble motion and the local heat transfer coefficient (HTC) on the heated wall with respect to time are discussed. It is found that for large Marangoni number (case 3), variation of surface tension has affected the bubble shape and temperature profile. The thermocapillary effect induces convection in a thin liquid film region, which augments the HTCs at specified positions. The numerical investigation also shows that the average HTC increased by 6.7% in case 3 when compared with case 1. Thus, it is very important to study further the effects of themocapillarity and the Marangoni effect on bubble growth in microchannels.
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November 2018
This article was originally published in
Journal of Heat Transfer
Research-Article
Simulation of Single Bubble Evaporation in a Microchannel in Zero Gravity With Thermocapillary Effect
Wei Li,
Wei Li
Fellow ASME
Department of Energy Engineering,
Zhejiang University,
Hangzhou 310027, China
e-mail: weili96@zju.edu.cn
Department of Energy Engineering,
Zhejiang University,
Hangzhou 310027, China
e-mail: weili96@zju.edu.cn
Search for other works by this author on:
Yang Luo,
Yang Luo
Department of Energy Engineering,
Zhejiang University,
Hangzhou 310027, China;
Zhejiang University,
Hangzhou 310027, China;
Department of Energy Engineering,
Collaborative Innovation Center of Advanced
Aero-Engine,
Zhejiang University,
Hangzhou 310027, China
Collaborative Innovation Center of Advanced
Aero-Engine,
Zhejiang University,
Hangzhou 310027, China
Search for other works by this author on:
Jingzhi Zhang,
Jingzhi Zhang
School of Energy and Power Engineering,
Shandong University,
Jinan 250061, China
Shandong University,
Jinan 250061, China
Search for other works by this author on:
W. J. Minkowycz
W. J. Minkowycz
Department of Mechanical and
Industrial Engineering,
University of Illinois at Chicago,
Chicago, IL 60607
Industrial Engineering,
University of Illinois at Chicago,
Chicago, IL 60607
Search for other works by this author on:
Wei Li
Fellow ASME
Department of Energy Engineering,
Zhejiang University,
Hangzhou 310027, China
e-mail: weili96@zju.edu.cn
Department of Energy Engineering,
Zhejiang University,
Hangzhou 310027, China
e-mail: weili96@zju.edu.cn
Yang Luo
Department of Energy Engineering,
Zhejiang University,
Hangzhou 310027, China;
Zhejiang University,
Hangzhou 310027, China;
Department of Energy Engineering,
Collaborative Innovation Center of Advanced
Aero-Engine,
Zhejiang University,
Hangzhou 310027, China
Collaborative Innovation Center of Advanced
Aero-Engine,
Zhejiang University,
Hangzhou 310027, China
Jingzhi Zhang
School of Energy and Power Engineering,
Shandong University,
Jinan 250061, China
Shandong University,
Jinan 250061, China
W. J. Minkowycz
Department of Mechanical and
Industrial Engineering,
University of Illinois at Chicago,
Chicago, IL 60607
Industrial Engineering,
University of Illinois at Chicago,
Chicago, IL 60607
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received November 3, 2017; final manuscript received April 27, 2018; published online July 23, 2018. Assoc. Editor: Guihua Tang.
J. Heat Transfer. Nov 2018, 140(11): 112403 (9 pages)
Published Online: July 23, 2018
Article history
Received:
November 3, 2017
Revised:
April 27, 2018
Citation
Li, W., Luo, Y., Zhang, J., and Minkowycz, W. J. (July 23, 2018). "Simulation of Single Bubble Evaporation in a Microchannel in Zero Gravity With Thermocapillary Effect." ASME. J. Heat Transfer. November 2018; 140(11): 112403. https://doi.org/10.1115/1.4040147
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