2 research outputs found
Effect of Coriolis Force on Shear Viscosity : A Non-Relativistic Description
We have addressed that during the transition from zero to finite rotation
picture, a transition from isotropic to anisotropic nature of shear viscosity
coefficients can be found due to Coriolis force as expected due to Lorentz
force at a finite magnetic field in earlier studies on the topics of
relativistic matter like quark-gluon plasma. We have done it for
non-relativistic matters for simplicity, with a future proposal to extend it
towards a relativistic description. Introducing the Coriolis force term in
relaxation time approximated Boltzmann transport equation, we have found
different effective relaxation times along the parallel, perpendicular, and
Hall directions in terms of actual relaxation time and rotating time period.
Comparing the present formalism with the finite magnetic field picture, we have
shown the equivalence of roles between the rotating and cyclotron time periods,
which define the rotating time period as the inverse of 2 times angular
velocity.Comment: 11 pages, 5 figures; For any comments or suggestions, emails are
welcom
Transport Coefficients of Relativistic Matter: A Detailed Formalism with a Gross Knowledge of Their Magnitude
The present review article has attempted a compact formalism description of transport coefficient calculations for relativistic fluid, which is expected in heavy ion collision experiments. Here, we first address the macroscopic description of relativistic fluid dynamics and then its microscopic description based on the kinetic theory framework. We also address different relaxation time approximation-based models in Boltzmann transport equations, which make a sandwich between Macro and Micro frameworks of relativistic fluid dynamics and finally provide different microscopic expressions of transport coefficients like the fluid’s shear viscosity and bulk viscosity. In the numeric part of this review article, we put stress on the two gross components of transport coefficient expressions: relaxation time and thermodynamic phase-space part. Then, we try to tune the relaxation time component to cover earlier theoretical estimations and experimental data-driven estimations for RHIC and LHC matter. By this way of numerical understanding, we provide the final comments on the values of transport coefficients and relaxation time in the context of the (nearly) perfect fluid nature of the RHIC or LHC matter