https://doi.org/10.1140/epja/i2012-12166-6
Letter
Dissipative hydrodynamics for multi-component systems
1
Institut für Theoretische Physik, Goethe Universität, Max-von-Laue Str. 1, 60438, Frankfurt am Main, Germany
2
Department of Physics, Tsinghua University, 100084, Beijing, China
Received:
12
June
2012
Revised:
3
October
2012
Accepted:
15
October
2012
Published online:
27
November
2012
Second-order dissipative hydrodynamic equations for each component of a multi-component system are derived using the entropy principle. Comparison of the solutions with kinetic transport results demonstrates validity of the obtained equations. We demonstrate how the shear viscosity of the total system can be calculated in terms of the involved cross-sections and partial densities. The presence of the inter-species interactions leads to a characteristic time dependence of the shear viscosity of the mixture, which also means that the shear viscosity of a mixture cannot be calculated using the Green-Kubo formalism the way it has been done recently. This finding is of interest for understanding of the shear viscosity of a quark-gluon plasma extracted from comparisons of hydrodynamic simulations with experimental results from RHIC and LHC.
© SIF, Springer-Verlag Berlin Heidelberg, 2012
