Effect of Melting on Energy Accommodation Coefficients of Aluminum–Noble Gas Systems

2020 ◽  
Vol 124 (40) ◽  
pp. 22105-22116
Author(s):  
Jyotishraj Thoudam ◽  
Tejas Mane ◽  
Dilip Sundaram
Keyword(s):  
Noble Gas ◽  
Energy Accommodation ◽  
Accommodation Coefficients

scholarly journals Recombination and chemical energy accommodation coefficients from chemical dynamics simulations: O/O2 mixtures reacting over a β-cristobalite (001) surface

2011 ◽  
Vol 13 (39) ◽  
pp. 17494 ◽  
Author(s):  
Víctor Morón ◽  
Pablo Gamallo ◽  
Ludovic Martin-Gondre ◽  
Cédric Crespos ◽  
Pascal Larregaray ◽  
...  
Keyword(s):  
Chemical Energy ◽  
Chemical Dynamics ◽  
Energy Accommodation ◽  
Accommodation Coefficients ◽  
Dynamics Simulations

Energy accommodation coefficients of internally excited molecules

1981 ◽  
Vol 75 (9) ◽  
pp. 4621-4625 ◽  
Author(s):  
D. R. Anderson ◽  
E.‐H. Lee ◽  
R. H. Pildes ◽  
S. L. Bernasek
Keyword(s):  
Energy Accommodation ◽  
Accommodation Coefficients ◽  
Excited Molecules

scholarly journals Measurement of Heat Transfer from Anodic Oxide Film on Aluminum in High Knudsen Number Flows

Micromachines ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 234 ◽  
Author(s):  
Hiroki Yamaguchi ◽  
Kenji Kito
Keyword(s):  
Heat Transfer ◽  
Oxide Films ◽  
Sample Surface ◽  
Anodic Oxide ◽  
Heat Fluxes ◽  
Molecular Flow ◽  
Sem Images ◽  
Anodic Oxide Films ◽  
Energy Accommodation ◽  
Accommodation Coefficients

The heat transfer in vacuum depends on the gas–surface interaction. In this study, the heat flux from anodic oxide films on aluminum with different anodizing times through a gas confined between two surfaces with different temperatures was studied. We prepared a non-treated surface, a surface with a normal anodizing time of 30 min, and a surface with 90 min, where the formed film would partially dissolve by long time exposure to the solution. The formation of the films was checked by electrical resistance. Scanning electron microscope (SEM) images were obtained for the three sample surfaces. Even though it was difficult to observe the hexagonal cylindrical cell structures on anodic oxide films, the 30 min sample surface was shown to be rough, and it was relatively smooth and powdery for the 90 min sample surface. The heat fluxes from three sample surfaces were measured from the free-molecular to near free-molecular flow regimes, and analyzed to obtain the energy accommodation coefficients. The heat fluxes were well fitted by the fitting curves. The energy accommodation coefficients for both helium and argon increased by anodizing an aluminum sample surface, while they decreased with increasing the anodizing time up to 90 min indicating the dissolution of the film.

Restrictions on the values of energy accommodation coefficients

1974 ◽  
Vol 43 (1) ◽  
pp. 306-308 ◽  
Author(s):  
Frank O. Goodman ◽  
Harold Y. Wachman
Keyword(s):  
Energy Accommodation ◽  
Accommodation Coefficients
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