Effect of salt additives on film boiling heat transfer and mechanism of quenching temperature rise

2010 ◽  
Vol 40 (2) ◽  
pp. 101-113 ◽  
Author(s):  
Takahiro Arai ◽  
Masahiro Furuya
Keyword(s):  
Heat Transfer ◽  
Temperature Rise ◽  
Boiling Heat Transfer ◽  
Film Boiling ◽  
Quenching Temperature

Effect of Nanofluid on the Film Boiling Behavior at Vapor Film Collapse

2009 ◽  
Author(s):  
Takahiro Arai ◽  
Masahiro Furuya
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Direct Contact ◽  
Film Surface ◽  
Film Boiling ◽  
Vapor Film ◽  
Quenching Temperature ◽  
Steel Sphere ◽  
Film Collapse ◽  
Al2o3 Nanofluid

A high-temperature stainless-steel sphere was immersed into Al2O3 nanofluid to investigate film boiling heat transfer and collapse of vapor film. Surface temperature is referred to the measured value of thermocouples embedded into and welded onto a surface of the sphere. A direct contact between the immersed sphere and Al2O3 nanofluids is quantified by the acquired electric conductivity. The Al2O3 nanofluid concentration is varied from 0.024 to 1.3 vol%. A film boiling heat transfer rate of Al2O3 nanofluid is almost the same or slightly lower than that of water. A quenching temperature rises slightly with increased the Al2O3 nanofluid concentrations. In both water and Al2O3 nanofluid, the direct contact signals between the sphere and coolant were not detected before vapor film collapse.

Film boiling heat transfer around a vertical finite-length cylinder with a convex hemispherical bottom

2010 ◽  
pp. n/a-n/a
Author(s):  
Takashi Yamada ◽  
Kaoru Toyoda ◽  
Toru Shigechi ◽  
Satoru Momoki ◽  
Kuniyasu Kanemaru ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Finite Length ◽  
Boiling Heat Transfer ◽  
Film Boiling
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