Dissipative relativistic fluid dynamics: a new way to derive the equations of motion from kinetic theory

Details Dissipative relativistic fluid dynamics: a new way to derive the equations of motion from kinetic theory Dissipative relativistic fluid dynamics: a new way to derive the equations of motion from kinetic theory

2010-04-28

arxiv.org/abs/1004.5013v1

Phys.Rev.Lett.105:162501,2010

Physics

Nuclear Physics

Nuclear Theory

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.105.162501

We re-derive the equations of motion of dissipative relativistic fluid dynamics from kinetic theory. In contrast to the derivation of Israel and Stewart, which considered the second moment of the Boltzmann equation to obtain equations of motion for the dissipative currents, we directly use the latter's definition. Although the equations of motion obtained via the two approaches are formally identical, the coefficients are different. We show that, for the one-dimensional scaling expansion, our method is in better agreement with the solution obtained from the Boltzmann equation.

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