Applicability of viscous hydrodynamics at RHIC

Abstract

In an earlier work (arXiv:0808.0953) we established that causal Israel-Stewart viscous hydrodynamics is only accurate in RHIC applications at very low shear viscosities 4 pi eta_s / s < ~ 1.5-2. We show here that the region of applicability is significantly reduced if bulk viscosity plays a role in the dynamics.

Presentation at Quark Matter 2009 - contribution to the proceedings. v2: very minor changes in text and labels in Fig. 1

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• Bulk Viscosity and Cavitation in Boost-Invariant Hydrodynamic Expansion
• Relativistic Causal Hydrodynamics Derived from Boltzmann Equation: a novel reduction theoretical approach
• The applicability of hydrodynamics in heavy ion collisions at $\sqrt{s_{\mathrm{NN}}}$= 2.4-7.7 GeV
• A new relativistic viscous hydrodynamics code and its application to the Kelvin-Helmholtz instability in high-energy heavy-ion collisions
• Matching of nonthermal initial conditions and hydrodynamic stage in ultrarelativistic heavy-ion collisions
• Derivation of second-order relativistic hydrodynamics for reactive multi-component systems
• Fluctuations in Relativistic Causal Hydrodynamics
• Entropy production for an interacting quark-gluon plasma
• Elliptic flow from Coulomb interaction and low density elastic scattering