The flow boiling process suffers from severe instabilities induced due to nucleation of vapor bubbles in a superheated liquid environment in a minichannel or a microchannel. In an effort to improve the flow boiling stability, several modifications are introduced and experiments are performed on parallel rectangular microchannels (hydraulic diameter of ) 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 phenomenon. The results are compared with the unrestricted flow configurations in smooth channels.
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Stabilization of Flow Boiling in Microchannels Using Pressure Drop Elements and Fabricated Nucleation Sites
Satish G. Kandlikar,
Satish G. Kandlikar
Fellow ASME
Thermal Analysis and Microfluidics Laboratory, Mechanical Engineering Department,
e-mail: sgkeme@rit.edu
Rochester Institute of Technology
, Rochester, New York, 14623
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Wai Keat Kuan,
Wai Keat Kuan
Thermal Analysis and Microfluidics Laboratory, Mechanical Engineering Department,
e-mail: wxk0320@rit.edu
Rochester Institute of Technology
, Rochester, New York, 14623
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Daniel A. Willistein,
Daniel A. Willistein
Thermal Analysis and Microfluidics Laboratory, Mechanical Engineering Department,
e-mail: daw7820@rit.edu
Rochester Institute of Technology
, Rochester, New York, 14623
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John Borrelli
John Borrelli
Thermal Analysis and Microfluidics Laboratory, Mechanical Engineering Department,
e-mail: jxb9224@rit.edu
Rochester Institute of Technology
, Rochester, New York, 14623
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Satish G. Kandlikar
Fellow ASME
Thermal Analysis and Microfluidics Laboratory, Mechanical Engineering Department,
Rochester Institute of Technology
, Rochester, New York, 14623e-mail: sgkeme@rit.edu
Wai Keat Kuan
Thermal Analysis and Microfluidics Laboratory, Mechanical Engineering Department,
Rochester Institute of Technology
, Rochester, New York, 14623e-mail: wxk0320@rit.edu
Daniel A. Willistein
Thermal Analysis and Microfluidics Laboratory, Mechanical Engineering Department,
Rochester Institute of Technology
, Rochester, New York, 14623e-mail: daw7820@rit.edu
John Borrelli
Thermal Analysis and Microfluidics Laboratory, Mechanical Engineering Department,
Rochester Institute of Technology
, Rochester, New York, 14623e-mail: jxb9224@rit.edu
J. Heat Transfer. Apr 2006, 128(4): 389-396 (8 pages)
Published Online: December 2, 2005
Article history
Received:
April 4, 2005
Revised:
December 2, 2005
Citation
Kandlikar, S. G., Kuan, W. K., Willistein, D. A., and Borrelli, J. (December 2, 2005). "Stabilization of Flow Boiling in Microchannels Using Pressure Drop Elements and Fabricated Nucleation Sites." ASME. J. Heat Transfer. April 2006; 128(4): 389–396. https://doi.org/10.1115/1.2165208
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