AN EXPRIMENTAL RESEARCH OF SPRAY FALLING FILM BOILING ON THE SECOND GENERATION MECHANICALLY MADE POROUS SURFACE TUBES

Falling film boiling and pool boiling on plain circular tubes: Influence of surface roughness, surface material and saturation temperature on heat transfer and dryout

Experimental Thermal and Fluid Science ◽

10.1016/j.expthermflusci.2019.109870 ◽

2019 ◽

Vol 109 ◽

pp. 109870 ◽

Cited By ~ 5

Author(s):

Bradley D. Bock ◽

Josua P. Meyer ◽

John R. Thome

Keyword(s):

Heat Transfer ◽

Surface Roughness ◽

Pool Boiling ◽

Saturation Temperature ◽

Film Boiling ◽

Falling Film ◽

Surface Material ◽

Circular Tubes ◽

Roughness Surface

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Experimental and Numerical Studies of Water Droplet Impact on a Porous Surface in the Film-Boiling Regime

Industrial & Engineering Chemistry Research ◽

10.1021/ie800479r ◽

2008 ◽

Vol 47 (23) ◽

pp. 9174-9182 ◽

Cited By ~ 8

Author(s):

Zhao Yu ◽

Fei Wang ◽

L.-S. Fan

Keyword(s):

Water Droplet ◽

Droplet Impact ◽

Porous Surface ◽

Film Boiling ◽

Boiling Regime ◽

Numerical Studies

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Falling film boiling of refrigerants over nanostructured and roughened tubes: Heat transfer, dryout and critical heat flux

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2020.120452 ◽

2020 ◽

Vol 163 ◽

pp. 120452

Author(s):

Bradley D. Bock ◽

Matteo Bucci ◽

Christos N. Markides ◽

John R. Thome ◽

Josua P. Meyer

Keyword(s):

Heat Transfer ◽

Heat Flux ◽

Critical Heat Flux ◽

Film Boiling ◽

Falling Film

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Mechanism and Modeling of Rewetting Initiation of Hot Dry Surface in Saturated and Subcooled Film Boiling

2010 14th International Heat Transfer Conference, Volume 1 ◽

10.1115/ihtc14-22863 ◽

2010 ◽

Author(s):

Hiroyasu Ohtake ◽

Shingo Kobayashi ◽

Nozomi Nagashima ◽

Yasuo Koizumi

Keyword(s):

Pure Water ◽

Atmospheric Condition ◽

Taylor Instability ◽

Film Boiling ◽

Physical Parameters ◽

Falling Film ◽

Two Phase ◽

Conduction Model ◽

Impingement Jet ◽

Rayleigh Taylor Instability

The behavior of rewetting on a high superheated and dry surface, focusing on rewetting temperature just as collapse of saturated and subcooled film boiling was investigated experimentally and analytically. Saturated and subcooled pool film-boiling experiments were conducted by using a Silicon wafer with 20 mm length, 20 mm width and 0.5 mm thickness and pure water at atmospheric condition. Saturated and subcooled impingement jet experiments were also preformed. Then, the model analysis of rewetting initiation of a hot dry surface in saturated and subcooled film boiling was constructed by using hydrodynamics instability on liquid-vapor interface (Rayleigh-Taylor instability) and a heat conduction model (rewetting model under a falling film). Some physical parameters on Rayleigh-Taylor instability, for example released period of bubble from vapor film on a heater, generated volume rate of vapor and so on, were estimated by using Two-Phase Boundary Layer theory of saturated and subcooled film boiling. The present analytical results also showed that as the liquid subcooling was high, MHF temperature was higher. Namely, the predictions agreed with the present experimental results and Dhir-Purohit’s correlation. In addition, the present model of MHF temperature was developed by taking into account the dependence on thermal conductivity of wall of the MHF-temperature.

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