Relativistic liquids: GENERIC or EIT?

Sep 26, 2022
16 pages
Published in:
  • Class.Quant.Grav. 40 (2023) 7, 075012,
  • Class.Quant.Grav. 40 (2023) 075012
  • Published: Mar 14, 2023
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Abstract: (IOP)
We study the GENERIC hydrodynamic theory for relativistic liquids formulated by Öttinger and collaborators. We use the maximum entropy principle to derive its conditions for linear stability (in an arbitrary reference frame) and for relativistic causality. In addition, we show that, in the linear regime, its field equations can be recast into a symmetric-hyperbolic form. Once rewritten in this way, the linearised field equations turn out to be a particular realisation of the Israel–Stewart theory, where some of the Israel–Stewart free parameters are constrained. This also allows us to reinterpret the GENERIC framework in view of the principles of extended irreversible thermodynamics and to discuss its physical relevance to model (possibly viscoelastic) fluids.
Note:
  • relativistic hydrodynamics
  • extended irreversible thermodynamics
  • GENERIC formalism
  • viscosity
  • classical field theory
  • field equations: linear
  • stability: linear
  • liquid
  • thermodynamics
  • causality