Title of article :
On the radial expansion of tubular structures in a quark–gluon plasma
Author/Authors :
D.A. Fogaça، نويسنده , , F.S. Navarra، نويسنده , , L.G. Ferreira Filho، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2012
Pages :
20
From page :
22
To page :
41
Abstract :
We study the radial expansion of cylindrical tubes in a hot QGP. These tubes are treated as perturbations in the energy density of the system which is formed in heavy ion collisions at RHIC and LHC. We start from the equations of relativistic hydrodynamics in two spatial dimensions and cylindrical symmetry and perform an expansion of these equations in a small parameter, conserving the nonlinearity of the hydrodynamical formalism. We consider both ideal and viscous fluids and the latter are studied with a relativistic Navier–Stokes equation. We use the equation of state of the MIT bag model. In the case of ideal fluids we obtain a breaking wave equation for the energy density fluctuation, which is then solved numerically. We also show that, under certain assumptions, perturbations in a relativistic viscous fluid are governed by the Burgers equation. We estimate the typical expansion time of the tubes.
Keywords :
Quark–gluon plasma , MIT bag model , Relativistic fluid dynamics , Nonlinear wave equation , Burgers Equation
Journal title :
Nuclear physics A
Serial Year :
2012
Journal title :
Nuclear physics A
Record number :
1204043
Link To Document :
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