1206.1554 (G. S. Denicol et al.)

Derivation of fluid dynamics from kinetic theory with the 14--moment
approximation    [PDF]

G. S. Denicol, E. Molnár, H. Niemi, D. H. Rischke

We review a generic derivation of the fluid-dynamical equations from kinetic theory using the relativistic generalization of Grad's method of moments. We show that the usual 14-moment approximation of the single-particle distribution function does not uniquely close the fluid-dynamical equations of motion, but there are still infinitely many ways of closing the system, one of them leading to the traditional theory by Israel and Stewart. Although the different ways of closing the system result in the same form of the equations of motion, the transport coefficients are different in each case.

View original: http://arxiv.org/abs/1206.1554