Free Thermal Convection In Low Temperature Helium Gas

1998 ◽  
pp. 223-235
Author(s):  
Xiao Z. Wu
Keyword(s):  
Low Temperature ◽  
Thermal Convection ◽  
Helium Gas ◽  
Free Thermal Convection

scholarly journals The role of spin–orbit effects in the mobility of N+ ions moving in a helium gas at low temperature

2020 ◽  
Vol 74 (7) ◽  
Author(s):  
Lamia Aïssaoui ◽  
Peter J. Knowles ◽  
Moncef Bouledroua
Keyword(s):  
Low Temperature ◽  
Cross Sections ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Temperature Model ◽  
Helium Gas ◽  
Spin Orbit Interactions ◽  
High Level

Abstract The mobility of N+ ions in ground-state helium gas at very low temperature is examined with explicit inclusion of spin–orbit coupling effects. The ionic kinetics is treated theoretically with the three-temperature model. The N+–He interaction potentials, including spin–orbit coupling, are determined using high-level ab initio calculations. Then, the classical and quantal transport cross sections, both needed in the computation of the mobility coefficients, are calculated in terms of the collisional energy of the N+–He system. The numerical results, at temperature 4.3 K, show the spin–orbit interactions have negligible effect on the mobility coefficients. Graphical abstract

Free thermal convection in heterogeneous porous media

Geothermics ◽  
2016 ◽  
Vol 64 ◽  
pp. 152-162 ◽  
Author(s):  
Van Tam Nguyen ◽  
Thomas Graf ◽  
Carlos R. Guevara Morel
Keyword(s):  
Porous Media ◽  
Thermal Convection ◽  
Heterogeneous Porous Media ◽  
Free Thermal Convection

scholarly journals Free thermal convection driven by nonlocal effects

1995 ◽  
Vol 52 (4) ◽  
pp. 4533-4536 ◽  
Author(s):  
Jorge Ibsen ◽  
Rodrigo Soto ◽  
Patricio Cordero
Keyword(s):  
Thermal Convection ◽  
Nonlocal Effects ◽  
Free Thermal Convection
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