Boiling Heat Transfer to Liquid Hydrogen from Flat Surfaces

1960 ◽  
pp. 254-261 ◽  
Author(s):  
C. R. Class ◽  
J. R. DeHaan ◽  
M. Piccone ◽  
R. B. Cost
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Liquid Hydrogen ◽  
Flat Surfaces

scholarly journals Film Boiling Heat Transfer from a Wire to Upward Flow of Liquid Hydrogen: Effect of Wire Diameter

2019 ◽  
Vol 502 ◽  
pp. 012089
Author(s):  
M Shiotsu ◽  
Y Shirai ◽  
T Matsumoto ◽  
K Fujita ◽  
Y Iwami ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Liquid Hydrogen ◽  
Wire Diameter ◽  
Film Boiling ◽  
Hydrogen Effect ◽  
Upward Flow

scholarly journals A Study on the Boiling Heat Transfer from Flat Surfaces under High Heat Flux : 1st Report, Burnout Heat Flux

1962 ◽  
Vol 28 (189) ◽  
pp. 587-595
Author(s):  
Seikan ISHIGAI ◽  
Kiyoshi INOUE ◽  
Akiharu KAWABATA ◽  
Yutaka SADAMORI ◽  
Zyumei KIWAKI ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Boiling Heat Transfer ◽  
High Heat ◽  
High Heat Flux ◽  
Flat Surfaces

Pool Boiling Heat Transfer of Water on Hydrophilic Surfaces With Different Wettability

2016 ◽  
Author(s):  
Adam R. Girard ◽  
Jinsub Kim ◽  
Seung M. You
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Pool Boiling ◽  
Copper Surface ◽  
Contact Angles ◽  
Copper Surfaces ◽  
Nanoscale Structures ◽  
Flat Surfaces ◽  
Hydrophilic Surfaces ◽  
Alkali Solutions

The effect of wettability on boiling heat transfer (BHT) coefficient and critical heat flux (CHF) in pool boiling of water on hydrophilic surfaces having different contact angles was investigated. Hot alkali solutions were utilized to promote cupric and cuprous oxide growth which exhibited micro and nanoscale structures on copper surfaces, with thicknesses on the order of a couple of micrometers. These structure and surface energy variations result in different levels of wettability and roughness while maintaining the effusivity of the bare copper surface. The study showed that the BHT coefficient has an inverse relationship to wettability; the BHT coefficient decreases as wettability increases. Furthermore, it was shown that this dependency between BHT coefficient and wettability is more significant than the relationship between BHT coefficient and surface roughness. The CHF was also found to increase with increases in wettability and roughness. For the most hydrophilic surface tested in this study, CHF values were recorded near the 2,000 kW/m2 mark. This value is compared with maximum values reported in literature for water on non-structured flat surfaces without area enhancements. Based on these results it is postulated that there exists a true hydrodynamic CHF limit for pool boiling with water on flat surfaces, very near 2,000 kW/m2, independent of heater material, representing an 80% increase in the limit suggested by Zuber [1].

scholarly journals Film boiling heat transfer properties of liquid hydrogen flowing inside of heated pipe

2019 ◽  
Vol 502 ◽  
pp. 012090
Author(s):  
T Matsumoto ◽  
Y Shirai ◽  
M Shiotsu ◽  
K Fujita ◽  
Y Iwami ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Liquid Hydrogen ◽  
Film Boiling ◽  
Transfer Properties

scholarly journals Film Boiling Heat Transfer Properties of Liquid Hydrogen in Natural Convection

2015 ◽  
Vol 67 ◽  
pp. 643-648 ◽  
Author(s):  
Y. Horie ◽  
Y. Shirai ◽  
M. Shiotsu ◽  
T. Matsuzawa ◽  
K. Yoneda ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Boiling Heat Transfer ◽  
Liquid Hydrogen ◽  
Film Boiling ◽  
Transfer Properties

scholarly journals Film Boiling Heat Transfer from a Round Wire to Liquid Hydrogen Flowing Upward in a Concentric Annulus

2015 ◽  
Vol 67 ◽  
pp. 631-636 ◽  
Author(s):  
M. Shiotsu ◽  
Y. Shirai ◽  
Y. Oura ◽  
Y. Horie ◽  
K. Yoneda ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Liquid Hydrogen ◽  
Film Boiling ◽  
Concentric Annulus ◽  
Round Wire

Evaporation Momentum Force and Its Relevance to Boiling Heat Transfer

2020 ◽  
Vol 142 (10) ◽  
Author(s):  
Satish G. Kandlikar
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Flow Instability ◽  
Flow Boiling ◽  
Saturation Temperature ◽  
Bulk Liquid ◽  
Interface Motion ◽  
Flat Surfaces ◽  
Curvature Effects ◽  
The Individual

Abstract As a liquid evaporates into its vapor, the vapor phase leaves at a higher velocity than the approaching liquid and exerts a net momentum force on the evaporating interface. This force is especially relevant in the contact line region where liquid temperature is higher than the bulk liquid, and local saturation temperature is reduced due to curvature effects. These factors result in an increased evaporative flux resulting in higher evaporation momentum force that can influence the interface motion and bubble trajectory. This force provides a new mechanism for enhancing boiling heat transfer by altering the individual bubble trajectory. In microchannels, it can lead to flow instability. These effects are critically evaluated in this paper and their relevance to bubble growth and heat transfer phenomena during pool and flow boiling is presented. Two nondimensional groups K1 and K2, respectively, representing the ratio of evaporation momentum force to inertia and surface tension forces, have been used in modeling heat transfer and interface motion. Evaporation momentum force has been successfully applied in modeling critical heat flux (CHF) in pool and flow boiling, analyzing instability during flow boiling in microchannels, controlling individual bubble motion, and enhancing CHF and heat transfer coefficient (HTC) during boiling on flat surfaces as well as tubular geometries.

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