scholarly journals Experimental Study on Flow Film Boiling Heat Transfer over a Vertical Cylinder.

2002 ◽  
Vol 37 (4) ◽  
pp. 310-316
Author(s):  
Q.S. LIU ◽  
M. Shiotsu ◽  
K. Fukuda
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Boiling Heat Transfer ◽  
Vertical Cylinder ◽  
Film Boiling ◽  
Flow Film Boiling

Experimental Study on the Effect of Orientation of Heating Circular Plate on Film Boiling Heat Transfer for Fluorocarbon Refrigerant R-11

1978 ◽  
Vol 100 (4) ◽  
pp. 624-628 ◽  
Author(s):  
N. Seki ◽  
S. Fukusako ◽  
K. Torikoshi
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Circular Plate ◽  
Boiling Heat Transfer ◽  
Film Boiling ◽  
Brass Plate ◽  
Bottom Side ◽  
Film Coefficient

The characteristics of film boiling heat transfer from a heated horizontal circular brass plate to a pool of fluorocarbon R-11 are examined for the case in which only the top side of the plate is in contact with the liquid (facing upward) and for the case in which the bottom side of the plate is in contact with the liquid (facing downward). It is found that the film coefficient for the facing downwards orientation of the plate was found to be closely correlated by the following: Nu=0.35(L/CpΔT)Gr0.25·Pr0.25

Experiments and Analysis on Film Boiling Heat Transfer Around a Finite-Length Vertical Cylinder With a Convex Surface Swelling Downward

2008 ◽  
Author(s):  
Satoru Momoki ◽  
Kaoru Toyoda ◽  
Takashi Yamada ◽  
Toru Shigechi ◽  
Tomohiko Yamaguchi
Keyword(s):  
Heat Transfer ◽  
Lower Limit ◽  
Finite Length ◽  
Boiling Heat Transfer ◽  
Convex Surface ◽  
Analytical Data ◽  
Vertical Cylinder ◽  
Film Boiling ◽  
Bottom Surface ◽  
Bottom Side

A method of predicting the overall heat transfer coefficient and the temperature at the lower limit of film boiling for a finite-length cylinder with flat top and bottom surfaces has been researched and proposed in a previous paper. This paper presents and compares an analysis in the case of a cylinder with a hemispherical bottom. The film boiling heat transfer around a vertical silver cylinder with a convex hemispherical bottom surface is investigated both experimentally and analytically in the present study. The obtained results are also compared and discussed with the authors’ previous results for a finite-length cylinder with flat top and bottom surfaces. Quenching experiments were performed using silver cylinders in saturated water. The diameter and length of the test cylinders are 32mm and 48mm, respectively. The test cylinder was heated up to about 600°C in an electric furnace and then cooled down in saturated quiescent water at atmospheric pressure. The resultant cooling and boiling curves and photographs of the film boiling phenomena are presented and discussed. The average heat transfer performance of the hemispherically bottomed cylinder is about 20% higher than that of the flat bottomed cylinder. The degree of wall superheating at the lower limit of film boiling is about 133K. The saturated film boiling heat transfer around the vertical finite-length cylinder with a convex hemispherical bottom was analyzed by taking into account the convective heat transfers from the bottom, side and top surfaces of the cylinder. The resulting analytical data correlated closely with the experimental data in the present study.

An Experimental Study of Transition and Film Boiling Heat Transfer in Liquid-Saturated Porous Bed

1986 ◽  
Vol 108 (1) ◽  
pp. 117-124 ◽  
Author(s):  
S. Fukusako ◽  
T. Komoriya ◽  
N. Seki
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Circular Cylinder ◽  
Boiling Heat Transfer ◽  
Heating Surface ◽  
Local Maximum ◽  
Nucleate Boiling ◽  
Film Boiling ◽  
Experimental Investigations ◽  
Porous Bed

Experimental investigations of transition and film boiling in a liquid-saturated porous bed are reported. The porous bed contained in a vertical circular cylinder is made up of packed spherical beads whose diameters range from 1.0 to 16.5 mm, while the depth of the bed overlying the heating surface varies from 10 to 300 mm. Water and fluorocarbon refrigerants R-11 and R-113 are adopted as testing liquids. Special attention is focused on the effect of the diameter of spherical beads on boiling heat transfer in the transition boiling region. It is found that for the small bead diameters the steady boiling heat transfer rises monotonically with temperature from nucleate boiling through the film boiling region, without going through a local maximum.

Dispersed-Flow Film Boiling Heat Transfer Data near Spacer Grids in a Rod Bundle

1983 ◽  
Vol 60 (2) ◽  
pp. 304-313 ◽  
Author(s):  
Graydon L. Yoder ◽  
David G. Morris ◽  
Charles B. Mullins ◽  
Larry J. Ott
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Film Boiling ◽  
Dispersed Flow ◽  
Transfer Data ◽  
Spacer Grids ◽  
Rod Bundle ◽  
Flow Film Boiling

scholarly journals Flow Film Boiling Heat Transfer in Water and Freon-113.

2002 ◽  
Vol 45 (3) ◽  
pp. 465-472 ◽  
Author(s):  
Qiusheng LIU ◽  
Masahiro SHIOTSU ◽  
Akira SAKURAI
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Film Boiling ◽  
Flow Film Boiling
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