Origin of the Relaxation Time in Dissipative Fluid Dynamics

Details Origin of the Relaxation Time in Dissipative Fluid Dynamics Origin of the Relaxation Time in Dissipative Fluid Dynamics

2011-02-23

arxiv.org/abs/1102.4780v2

Phys.Rev.D83:074019,2011

Physics

High Energy Physics

High Energy Physics - Theory

27 pages, 3 figures; as published in PRD

Scientific paper

10.1103/PhysRevD.83.074019

We show how the linearized equations of motion of any dissipative current are determined by the analytical structure of the associated retarded Green's function. If the singularity of the Green's function, which is nearest to the origin in the complex-frequency plane, is a simple pole on the imaginary frequency axis, the linearized equations of motion can be reduced to relaxation-type equations for the dissipative currents. The value of the relaxation time is given by the inverse of this pole. We prove that, if the relaxation time is sent to zero, or equivalently, the pole to infinity, the dissipative currents approach the values given by the standard gradient expansion.

Affiliated with

Also associated with

No associations

Rating

Origin of the Relaxation Time in Dissipative Fluid Dynamics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Origin of the Relaxation Time in Dissipative Fluid Dynamics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Origin of the Relaxation Time in Dissipative Fluid Dynamics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-175208