On the relation between critical heat flux and outlet flow pattern of forced convection boiling in uniformly heated vertical tubes

1981 ◽  
Vol 24 (3) ◽  
pp. 541-544 ◽  
Author(s):  
Y. Katto
Keyword(s):  
Heat Flux ◽  
Flow Pattern ◽  
Forced Convection ◽  
Critical Heat Flux ◽  
Outlet Flow ◽  
Vertical Tubes

THE CALCULATION OF CRITICAL HEAT FLUX IN FORCED CONVECTION BOILING

1974 ◽  
Author(s):  
P. B. Whalley ◽  
P. Hutchinson ◽  
Geoffrey F. Hewitt
Keyword(s):  
Heat Flux ◽  
Forced Convection ◽  
Critical Heat Flux

scholarly journals Influence of the Flow Pattern on Critical Heat Flux

2014 ◽  
Vol 27 (5) ◽  
pp. 571-576
Author(s):  
Goshi YAMASHINA ◽  
Noriko NAKAMURA ◽  
Takeyuki AMI ◽  
Hisashi UMEKAWA ◽  
Mamoru OZAWA
Keyword(s):  
Heat Flux ◽  
Flow Pattern ◽  
Critical Heat Flux

Flow Behavior and Flow Boiling Heat Transfer in Thin-Rectangular Mini-Channels

2008 ◽  
Author(s):  
Yasuo Koizumi ◽  
Hiroyasu Ohtake ◽  
Tomonari Yamada
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Flow Pattern ◽  
Critical Heat Flux ◽  
Boiling Heat Transfer ◽  
Annular Flow ◽  
Flow Channel ◽  
Heat Transfer Surface ◽  
Liquid Slug ◽  
Flux Condition

Boiling heat transfer of thin-rectangular channels of the width of 10 mm has been examined. The height of the flow channel was in a range from 0.6 mm to 0.4 mm. Experimental fluid was water. Bubbly flow, slug flow, semi annular flow and annular flow were observed. The flow pattern transition agreed well with the Baker flow pattern map for the usual sized flow path. The critical heat flux was lower than the value of the usual sized flow channel. The Koizumi and Ueda method predicted well the trend of the critical heat flux of the present experiments. At the critical heat flux condition, the heat transfer surface was covered by liquid slug, a large bubble pushed away the liquid slug, a dry area was formed on the heat transfer surface and then liquid slug came around to cover the heat transfer surface again. This process repeated rapidly. Following this observation, a heat transfer surface temperature calculation model at the critical heat flux condition was proposed. The calculated result re produced the experimental result.

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