Hydrodynamics from free-streaming to thermalization and back again
arXiv:1911.07765 · doi:10.1016/j.physletb.2019.135158
Abstract
We study the evolution of the Knudsen and Reynolds numbers in (0+1)-dimensionally expanding fluids with Bjorken symmetry for systems whose microscopic mean free path rises more quickly with time than usually assumed. This allows us to explore within a simple 1-dimensional model the transition from initially thermalizing to ultimately decoupling dynamics. In all cases studied the dynamics is found to be controlled by hydrodynamic attractors for both the Knudsen and Reynolds numbers whose trajectories undergo characteristic changes as the dynamics changes from thermalizing to decoupling.
7 pages, 6 figures. Added Fig. 6 and associated discussion. This version accepted for publication in Physics Letters B
References in corpus (11)
- Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
- Dissipative Dynamics of Highly Anisotropic Systems
- Highly-anisotropic and strongly-dissipative hydrodynamics for early stages of relativistic heavy-ion collisions
- Multiplicity scaling in ideal and viscous hydrodynamics
- Entropy Current in Conformal Hydrodynamics
- A new exact solution of the relativistic Boltzmann equation and its hydrodynamic limit
- Anisotropic Hydrodynamics: Three lectures
- Studying the validity of relativistic hydrodynamics with a new exact solution of the Boltzmann equation
- On the hydrodynamic attractor of Yang-Mills plasma
- Relativistic third-order viscous corrections to the entropy four-current from kinetic theory
- Dynamical systems and nonlinear transient rheology of the far-from-equilibrium Bjorken flow