Molecular hydrodynamics of degenerate weakly nonideal bose gas. I. Generalized equations of two-fluid hydrodynamics

1992 ◽  
Vol 93 (3) ◽  
pp. 1367-1402 ◽  
Author(s):  
Yu. A. Tserkovnikov
Keyword(s):  
Bose Gas ◽  
Generalized Equations ◽  
Fluid Hydrodynamics ◽  
Two Fluid

scholarly journals Two-fluid hydrodynamics for a trapped weakly interacting Bose gas

1998 ◽  
Vol 57 (6) ◽  
pp. 4695-4698 ◽  
Author(s):  
E. Zaremba ◽  
A. Griffin ◽  
T. Nikuni
Keyword(s):  
Bose Gas ◽  
Weakly Interacting ◽  
Fluid Hydrodynamics ◽  
Two Fluid

scholarly journals Two-fluid hydrodynamics of a Bose gas including damping from normal fluid transport coefficients

2000 ◽  
Vol 78 (5-6) ◽  
pp. 415-432 ◽  
Author(s):  
T Nikuni ◽  
A Griffin ◽  
E Zaremba
Keyword(s):  
Fluid Transport ◽  
Transport Coefficients ◽  
Thermal Fluctuations ◽  
Bose Gas ◽  
Second Sound ◽  
Hydrodynamic Modes ◽  
Normal Fluid ◽  
Strongly Coupled ◽  
Fluid Hydrodynamics ◽  
Two Fluid

We extend our recent work on the two-fluid hydrodynamics of the condensate and noncondensate in a trapped Bose gas by including the dissipation associated with viscosity and thermal conduction in the thermal cloud. For purposes of illustration, we consider the hydrodynamic modes in the case of a uniform Bose gas. A finite thermal conductivity and shear viscosity give rise to a damping of the first and second sound modes, in addition to the damping found previously due to the lack of diffusive equilibrium between the condensate and noncondensate. The relaxational mode associated with this equilibration process is strongly coupled to thermal fluctuations and reduces to the usual thermal diffusion mode above the Bose-Einstein transition. In contrast to the standard Landau two-fluid hydrodynamics, we predict a damped mode centered at zero frequency, in addition to the usual second sound doublet.PACS Nos.: 03.75.Fi, 05.30Jp, 67.40.Db

Two-fluid hydrodynamics in a dilute Bose gas

2009 ◽  
pp. 322-348
Author(s):  
Allan Griffin ◽  
Tetsuro Nikuni ◽  
Eugene Zaremba
Keyword(s):  
Bose Gas ◽  
Dilute Bose Gas ◽  
Fluid Hydrodynamics ◽  
Two Fluid
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