Influence of angular momentum on transport coefficients in rarefied gases

2020 ◽  
Vol 553 ◽  
pp. 124673
Author(s):  
G. Oblapenko ◽  
E.V. Kustova
Keyword(s):  
Angular Momentum ◽  
Transport Coefficients ◽  
Rarefied Gases

scholarly journals Hydrodynamics of simply spinning black holes & hydrodynamics for spinning quantum fluids

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Markus Garbiso ◽  
Matthias Kaminski
Keyword(s):  
Black Holes ◽  
Angular Momentum ◽  
Transport Coefficients ◽  
Density Ratio ◽  
Heavy Ion ◽  
Entropy Density ◽  
Quantum Fluids ◽  
Longitudinal Momentum ◽  
De Sitter ◽  
Spatial Anisotropy

Abstract We find hydrodynamic behavior in large simply spinning five-dimensional Anti-de Sitter black holes. These are dual to spinning quantum fluids through the AdS/CFT correspondence constructed from string theory. Due to the spatial anisotropy introduced by the angular momentum, hydrodynamic transport coefficients are split into groups longitudinal or transverse to the angular momentum, and aligned or anti-aligned with it. Analytic expressions are provided for the two shear viscosities, the longitudinal momentum diffusion coefficient, two speeds of sound, and two sound attenuation coefficients. Known relations between these coefficients are generalized to include dependence on angular momentum. The shear viscosity to entropy density ratio varies between zero and 1/(4π) depending on the direction of the shear. These results can be applied to heavy ion collisions, in which the most vortical fluid was reported recently. In passing, we show that large simply spinning five-dimensional Myers-Perry black holes are perturbatively stable for all angular momenta below extremality.

Thermodynamics and the quantum stress-energy and spin tensor

2014 ◽  
Vol 11 (02) ◽  
pp. 1450020 ◽  
Author(s):  
Francesco Becattini ◽  
Leonardo Tinti
Keyword(s):  
Angular Momentum ◽  
Total Energy ◽  
Transport Coefficients ◽  
Energy Tensor ◽  
Quantum Field ◽  
Total Entropy ◽  
Spin Tensor ◽  
Stress Energy Tensor ◽  
Stress Energy ◽  
General Relativistic

In this paper, we show that thermodynamics is sensitive to the existence of a fundamental spin tensor. In general, the thermodynamics is not invariant by a change of the stress-energy tensor of a fundamental quantum field with a divergence transformation leaving the total energy, momentum and angular momentum unchanged. Among the quantities which are changed by such a transformation, there are densities at equilibrium with rotation and nonequilibrium ones like transport coefficients and total entropy. Therefore, at least in principle, it could be possible to probe the existence of a spin tensor, with major consequences for general relativistic theories, with a thermodynamics experiment.

Effect of the Critical Angular Momentum on Incomplete Fusion Dynamics

2015 ◽  
Vol 3 (1) ◽  
pp. 13-17
Author(s):  
D. Singh ◽  
◽  
S. Bharti Linda ◽  
Pankaj Kumar Giri ◽  
H. Kumar ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Incomplete Fusion ◽  
Critical Angular Momentum

TRANSPORT COEFFICIENTS IN F-S THEORY

1974 ◽  
Author(s):  
D. Bolmont ◽  
J. Salmon ◽  
M. Valton
Keyword(s):  
Transport Coefficients
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