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Modifications and extensions to the annular flow model

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Title Modifications and extensions to the annular flow model
 
Creator PATANKAR, PU
PURANIK, BP
 
Subject microchannel heat sinks
2-phase flow
 
Description Boiling heat transfer to fluid flow in microchannel heat sinks is being looked upon as a promising solution to the problem of cooling microprocessors with large power densities. In the present work, an annular flow model [1] is implemented to investigate the boiling heat transfer and two-phase flow characteristics in microchannel heat sinks. A modification in the model for the deposition mass transfer coefficient is proposed to better compare the existing experimental data [2]. The deposition mass transfer coefficient affects the distribution of liquid in the form of entrained droplets and the liquid film. The liquid film thickness is the most significant parameter in the determination of the heat transfer coefficient. The suggested change ensures consistent results for the behavior of the entrained fraction. We further report pressure drop results obtained using the modified annular flow model and a comparison with existing experimental data. Finally, we present results predicted by the annular flow model for non-uniform heating of a microchannel, in an effort to simulate hot spots on a microprocessor chip. A few preliminary results obtained from the modified model to simulate boiling and two-phase flow in a parallel microchannel device with non-uniform heating are presented.
 
Publisher AMER SOC MECHANICAL ENGINEERS
 
Date 2011-10-26T13:32:25Z
2011-12-15T09:12:21Z
2011-10-26T13:32:25Z
2011-12-15T09:12:21Z
2006
 
Type Proceedings Paper
 
Identifier Proceedings of the 4th International Conference on Nanochannels, Microchannnels, and Minichannels, Pts A and B,271-278
978-0-7918-4760-2
http://dspace.library.iitb.ac.in/xmlui/handle/10054/16024
http://hdl.handle.net/100/2620
 
Source 4th International Conference on Nanochannels, Microchannels, and Minichannels,Limerick, IRELAND,JUN 19-21, 2006
 
Language English