Bulk viscosity in heavy ion collision

Details Bulk viscosity in heavy ion collision Bulk viscosity in heavy ion collision

2012-01-20

arxiv.org/abs/1201.4230v1

Physics

Nuclear Physics

Nuclear Theory

4 pages, 4 figures, Contribution to the Proceeding of the 7th International Conference on Critical Point and Onset of Deconfin

Scientific paper

The effect of a temperature dependent bulk viscosity to entropy density ratio~($\zeta/s$) along with a constant shear viscosity to entropy density ratio~($\eta/s$) on the space time evolution of the fluid produced in high energy heavy ion collisions have been studied in a relativistic viscous hydrodynamics model. The boost invariant Israel-Stewart theory of causal relativistic viscous hydrodynamics is used to simulate the evolution of the fluid in 2 spatial and 1 temporal dimension. The dissipative correction to the freezeout distribution for bulk viscosity is calculated using Grad's fourteen moment method. From our simulation we show that the method is applicable only for $\zeta/s<0.004$.

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