Previous investigations of the critical heat flux in flow boiling have resulted in widely different hydrodynamic mechanisms for the occurrence of burnout. Results of the present study indicate that existing models are not completely realistic representations of the process. The present study sorts out the influences of the far-wake bubble breakoff and vapor sheet characteristics, gravity, surface wettability, and heater surface temperature distribution on the peak heat flux in flow boiling on cylindrical heaters. The results indicate that burnout is dictated by near-surface effects. The controlling factor appears to be the vapor escape pattern close to the heater surface. It is also shown that a deficiency of liquid at the downstream end of the heater surface is not the cause of burnout.
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Considerations in Predicting Burnout of Cylinders in Flow Boiling
P. Sadasivan,
P. Sadasivan
Heat Transfer/Phase Change Laboratory, Mechanical Engineering Department, University of Houston, Houston, TX 77204-4792
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J. H. Lienhard
J. H. Lienhard
Heat Transfer/Phase Change Laboratory, Mechanical Engineering Department, University of Houston, Houston, TX 77204-4792
Search for other works by this author on:
P. Sadasivan
Heat Transfer/Phase Change Laboratory, Mechanical Engineering Department, University of Houston, Houston, TX 77204-4792
J. H. Lienhard
Heat Transfer/Phase Change Laboratory, Mechanical Engineering Department, University of Houston, Houston, TX 77204-4792
J. Heat Transfer. Feb 1992, 114(1): 185-193 (9 pages)
Published Online: February 1, 1992
Article history
Received:
February 21, 1991
Revised:
June 30, 1991
Online:
May 23, 2008
Citation
Sadasivan, P., and Lienhard, J. H. (February 1, 1992). "Considerations in Predicting Burnout of Cylinders in Flow Boiling." ASME. J. Heat Transfer. February 1992; 114(1): 185–193. https://doi.org/10.1115/1.2911245
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