Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic dissipative hydrodynamics from kinetic theory with
  relaxation time approximation   Starting from Boltzmann equation with relaxation time approximation for the
collision term and using Chapman-Enskog like expansion for distribution
function close to equilibrium, we derive hydrodynamic evolution equations for
the dissipative quantities directly from their definition. Although the form of
the equations is identical to those obtained in traditional Israel-Stewart
approaches employing Grad's 14-moment approximation and second moment of
Boltzmann equation, the coefficients obtained are different. In the case of
one-dimensional scaling expansion, we demonstrate that our results are in
better agreement with numerical solution of Boltzmann equation as compared to
Israel-Stewart results. We also show that including approximate higher-order
corrections in viscous evolution significantly improves this agreement, thus
justifying the relaxation time approximation for the collision term.

33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex