Related Experiment Video
Updated: Jul 13, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Microscopic formula for transport coefficients of causal hydrodynamics
1Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, 21945-970 Rio de Janeiro, Brazil.
Abstract:
The Green-Kubo-Nakano formula should be modified in relativistic hydrodynamics because of the problem of acausality and the breaking of sum rules. In this Rapid Communication, we propose a formula to calculate the transport coefficients of causal hydrodynamics based on the projection operator method. As concrete examples, we derive the expressions for the diffusion coefficient, the shear viscosity coefficient, and corresponding relaxation times.
Related Concept Videos
Typical Model Studies
Modeling and Similitude
Steady, Laminar Flow Between Parallel Plates
Dimensional Analysis
In fluid mechanics, dimensional...
Couette Flow
Design Example: Creating a Hydraulic Model of a Dam Spillway

