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Modeling of pressure drop and heat transfer for flow boiling in a mini/micro-channel of rectangular cross-section
Shashwat Jain, Prasanna Jayaramu,
Published in Elsevier Ltd
2019
Volume: 140
   
Pages: 1029 - 1054
Abstract
In the present study, a one-dimensional model is proposed to estimate the pressure drop and heat transfer coefficient for flow boiling in a rectangular microchannel. The present work takes into account the pressure fluctuations caused due to the confined bubble growth and the effect of pressure fluctuations on the heat transfer characteristics. The heat transfer model considers five zones, namely, liquid slug, partially confined bubble, fully confined (elongated) bubble, partial dryout and full dryout. The model incorporates the thinning of liquid film due to shear stress at liquid-vapour interface in addition to evaporation. The transient fluctuations in pressure and heat transfer coefficient, along with the time-averaged ones, are verified with the experimental data available in the literature. Heat transfer characteristics with flow reversal caused by inlet compressibility are also presented. © 2019 Elsevier Ltd
About the journal
JournalData powered by TypesetInternational Journal of Heat and Mass Transfer
PublisherData powered by TypesetElsevier Ltd
ISSN00179310
Open AccessYes
Concepts (14)
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    Heat transfer coefficients
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    Liquid films
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    Microchannels
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    Pressure drop
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    Shear stress
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    Flow boiling
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    Flow reversals
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    Heat transfer characteristics
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    One-dimensional model
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    Pressure fluctuation
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    RECTANGULAR CROSS-SECTIONS
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    Rectangular microchannels
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    TRANSIENT FLUCTUATIONS
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    Drops