NDLI: Two-Phase Concurrent Separated Flow Model for Boiling Heat Transfer in Narrow Vertical Rectangular Space

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Pan, Liang-Ming Liang, Xiangfei Xin, Ming-Dao Jen, Tien-Chien Chen, Qinghua
Copyright Year	2005
Abstract	Compared with conventional channels, narrow and micro channels have significant characteristic of heat transfer enhancement. With smooth internal surface, such channels can efficiently avoid encrustation at the washing effect of the high-speed liquid. Moreover, heat transfer elements can be easily assembled. This type of channels have been adopted extensively in many engineering applications, e.g. microelectronic cooling, Advanced Nuclear Reactor, cryogenic, aviation and space technology and thermal engineering. In recent years, much work was focused upon flow patterns, heat transfer and pressure drop. Almost everyone thought the heat transfer enhancement mechanism of narrow and micro channels to be bubbles’ deformation and disturbance, which is insufficient to explain the heat transfer enhancement. In present work, an innovative model of quasi-one-dimensional vapor liquid two-phase concurrent separated flow was proposed for boiling heat transfer in vertical narrow rectangular space. Numerical results such as boiling heat transfer coefficient and liquid film thickness were obtained. Comparison of model results with reported experimental correlation indicates that the proposed model can predict heat transfer in narrow channels correctly, with the relative deviation less than 14%. Numerical simulating result confirms that heat conduction through liquid film is the predominant mechanism of boiling heat transfer in vapor liquid separated flow region in a vertical narrow rectangular space.
Sponsorship	Heat Transfer Division and Electronic and Photonic Packaging Division
Starting Page	239
Ending Page	245
Page Count	7
File Format	PDF
ISBN	0791847322
DOI	10.1115/HT2005-72859
e-ISBN	0791837629
Volume Number	Heat Transfer: Volume 2
Conference Proceedings	ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems
Language	English
Publisher Date	2005-07-17
Publisher Place	San Francisco, California, USA
Access Restriction	Subscribed
Subject Keyword	Narrow rectangular space Boiling heat transfer Two-phase concurrent separated flow Boiling Flow (dynamics) Heat transfer
Content Type	Text
Resource Type	Article

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