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Boiling flow through diverging microchannel

DSpace at IIT Bombay

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Field Value
 
Title Boiling flow through diverging microchannel
 
Creator DURYODHAN, VS
SINGH, SG
AGRAWAL, A
 
Subject Diverging microchannel
two-phase flow
pressure drop
flow regimes
flow instability
CRITICAL HEAT-FLUX
RECTANGULAR MICROCHANNELS
PARALLEL MICROCHANNELS
BUBBLE DYNAMICS
PRESSURE-DROP
SINKS
INSTABILITY
SINGLE
IMPACT
 
Description An experimental study of flow boiling through diverging microchannel has been carried out in this work, with the aim of understanding boiling in non-uniform cross-section microchannel. Diverging microchannel of 4 degrees of divergence angle and 146 mu m hydraulic diameter (calculated at mid-length) has been employed for the present study with deionised water as working fluid. Effect of mass flux (1181182 kg/m(2)-s) and heat flux (1.6-19.2 W/cm(2) on single and two-phase pressure drop and average heat transfer coefficient has been studied. Concurrently, flow visualization is carried out to document the various flow regimes and to correlate the pressure drop and average heat transfer coefficient to the underlying flow regime. Four flow regimes have been identified from the measurements: bubbly, slug, slug-annular and periodic dry-out/ rewetting. Variation of pressure drop with heat flux shows one maxima which corresponds to transition from bubbly to slug flow. It is shown that significantly large heat transfer coefficient (up to 107 kW/m(2)-K) can be attained for such systems, for small pressure drop penalty and with good flow stability.
 
Publisher INDIAN ACAD SCIENCES
 
Date 2014-10-16T14:18:00Z
2014-10-16T14:18:00Z
2013
 
Type Article
 
Identifier SADHANA-ACADEMY PROCEEDINGS IN ENGINEERING SCIENCES, 38(6)1067-1082
0256-2499
0973-7677
http://dspace.library.iitb.ac.in/jspui/handle/100/15764
 
Language en