Predicted thermal conductivity - Gaseous and liquid para-hydrogen.

1968 ◽  
Vol 5 (7) ◽  
pp. 868-870 ◽  
Author(s):  
D. JACK ELZINGA ◽  
GEORGE THODOS
Keyword(s):  
Thermal Conductivity ◽  
Para Hydrogen

Theoretical and experimental behaviour of a thermal conductivity detecter for the determination of the ortho/para hydrogen composition of gas mixtures in the temperature-jump region

1978 ◽  
Vol 56 (13) ◽  
pp. 1817-1826 ◽  
Author(s):  
David N. Mitchell ◽  
Donald J. Le Roy
Keyword(s):  
Thermal Conductivity ◽  
Temperature Jump ◽  
Accommodation Coefficient ◽  
Additional Parameter ◽  
Pure Hydrogen ◽  
Para Hydrogen ◽  
Temperature Jumps ◽  
Differential Behaviour ◽  
Two Parameters

The theoretical characteristics of a thermistor type thermal conductivity detector were determined for gases in the range 1 to 30 Torr, and were tested experimentally for mixtures of ortho- and para-hydrogen in pure hydrogen and in dilute mixtures of hydrogen in helium. It was found that the detector could be treated as being spherically symmetric. For temperature-jumps of up to 100 K, the total heat transfer could be adequately explained by a simplified form of the Kennard temperature-jump theory, only two parameters being required, the radius of the thermistor and its accommodation coefficient. The differential behaviour, the sensitivity to changes in ortho/para composition, required an additional parameter, the apparent gas phase relaxation rate for rotational energy.

HARDNESS AND THERMAL CONDUCTIVITY OF As-Se-Te CHALCOGENIDE GLASSES

1981 ◽  
Vol 42 (C4) ◽  
pp. C4-931-C4-934 ◽  
Author(s):  
M. F. Kotkata ◽  
M.B. El-den
Keyword(s):  
Thermal Conductivity ◽  
Chalcogenide Glasses
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