Experimental evaluation of pressure drop elements and fabricated nucleation sites for stabilizing flow boiling in minichannels and microchannels
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Date
2005-06Author
Kandlikar, Satish
Willistein, Daniel
Borrelli, John
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Show full item recordAbstract
The flow boiling process suffers from severe instabilities
induced due to nucleation of vapor bubbles in a minichannel or
a microchannel in a superheated liquid environment. In an
effort to improve the flow boiling stability, several
modifications are introduced and experiments are performed on
1054 x 197 μm microchannels with water as the working fluid.
The cavity sizes and local liquid and wall conditions required at
the onset of nucleation are analyzed. The effects of an inlet
pressure restrictor and fabricated nucleation sites are evaluated
as a means of stabilizing the flow boiling process and avoiding
the backflow phenomena. The results are compared with the
unrestricted flow configurations in smooth channels.
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