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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN Imprimir: 2152-5102
ISSN En Línea: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v25.i1-3.210
pages 243-254

An Analysis on Convective Heat Transfer of Film Boiling from a Finite-Size Horizontal Plate Facing Downward

Toru Shigechi
Department of Mechanical Systems Engineering, Nagasaki University, Nagasaki, Japan
Yu. Tokita
Department of Production Systems Engineering, Oita University, Oita, Japan
K. Kanemaru
Department of Mechanical Systems Engineering, Nagasaki University, Nagasaki, Japan
T. Yamada
Department of Mechanical Systems Engineering, Nagasaki University, Nagasaki, Japan
Satoru Momoki
Department of Mechanical Systems Engineering, Nagasaki University, Nagasaki, Japan

SINOPSIS

The two-dimensional, steady-state, laminar convective film boiling heat transfer from a finite-size horizontal plate facing downward to a stagnant saturated liquid was analyzed by assuming that the flow of vapor beneath the heated plate of a finite size was driven by a hydrostatic pressure gradient due to the change in the thickness of vapor film. The resulting boundary-layer equations for the vapor flow were solved by an integral method, taking into account the effect of the plate edge. The exact solutions obtained were examined for the case that the inclination angles of the vapor-liquid interface were arbitrarily given at the plate edge as the boundary condition. And the effects of profile shapes of velocity and temperature in the vapor film on the heat transfer rate were investigated. As expected, it was shown that the heat transfer rate took a maximum value at the inclination angle of 90 degrees. Accurate approximate expressions for the maximum heat transfer rate were obtained in terms of Nusselt number for four combinations of profile shapes and compared with experimental data.


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