Conformal higher-order viscoelastic fluid mechanics

Abstract

We present a generally covariant formulation of conformal higher-order viscoelastic fluid mechanics with strain allowed to take arbitrarily large values. We give a general prescription to determine the dynamics of a relativistic viscoelastic fluid in a way consistent with the hypothesis of local thermodynamic equilibrium and the second law of thermodynamics. We then elaborately study the transient time scales at which the strain almost relaxes and becomes proportional to the gradients of velocity. We particularly show that a conformal second-order fluid with all possible parameters in the constitutive equations can be obtained without breaking the hypothesis of local thermodynamic equilibrium, if the conformal fluid is defined as the long time limit of a conformal second-order viscoelastic system. We also discuss how local thermodynamic equilibrium could be understood in the context of the fluid/gravity correspondence.

26 pages; v2: minor corrections; v3: minor corrections, to appear in JHEP

References in corpus (6)

• Relativistic viscous hydrodynamics, conformal invariance, and holography
• Gravity & Hydrodynamics: Lectures on the fluid-gravity correspondence
• Local Fluid Dynamical Entropy from Gravity
• Entropy Current in Conformal Hydrodynamics
• Conformal Nonlinear Fluid Dynamics from Gravity in Arbitrary Dimensions
• Universal description of viscoelasticity with foliation preserving diffeomorphisms