A new family of polytropic bulk-viscous fluids reduces to Israel-Stewart near equilibrium and stays causal, symmetric hyperbolic, and thermodynamically consistent for arbitrarily large viscous stresses.
Tisza, Phys
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Extending Israel-Stewart theory: Causal bulk viscosity at large gradients
A new family of polytropic bulk-viscous fluids reduces to Israel-Stewart near equilibrium and stays causal, symmetric hyperbolic, and thermodynamically consistent for arbitrarily large viscous stresses.