The relationship between the mean radial electrohydrodynamic (EHD) pressure and the rate of the axial momentum flux and its influence on heat transfer enhancement and pressure drop in EHD-enhanced convective boiling of R-134a in a horizontal smooth tube was investigated in detail. A simple theory, which included the characteristics of two-phase flow, was developed to determine the mean radial EHD pressure. It was shown that the amount of heat transfer enhancement and the pressure drop penalty were dependent upon the size of the mean radial EHD pressure relative to the rate of the axial momentum flux. The influence of the mass flux, change in quality, and saturation temperature on the mean radial EHD pressure relative to the rate of the axial momentum flux was also studied. This study has provided a greater understanding of EHD enhancement of the convective boiling heat transfer. [S0022-1481(00)01802-8]
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Electrohydrodynamically Enhanced Convective Boiling: Relationship Between Electrohydrodynamic Pressure and Momentum Flux Rate
J. E. Bryan,
J. E. Bryan
Outokumpu Copper, 4720 Bowling Green Road, Franklin, KY 42134
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J. Seyed-Yagoobi
J. Seyed-Yagoobi
Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123
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J. E. Bryan
Outokumpu Copper, 4720 Bowling Green Road, Franklin, KY 42134
J. Seyed-Yagoobi
Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division, December 1, 1997; revision received, November 4, 1999. Associated Technical Editor: M. S. Sohal.
J. Heat Transfer. May 2000, 122(2): 266-277 (12 pages)
Published Online: November 4, 1999
Article history
Received:
December 1, 1997
Revised:
November 4, 1999
Citation
Bryan, J. E., and Seyed-Yagoobi, J. (November 4, 1999). "Electrohydrodynamically Enhanced Convective Boiling: Relationship Between Electrohydrodynamic Pressure and Momentum Flux Rate ." ASME. J. Heat Transfer. May 2000; 122(2): 266–277. https://doi.org/10.1115/1.521464
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