Abstract
Kinetic and hydrodynamic models describing early stages of relativistic heavy-ion collisions are discussed. We emphasise the role of the shear-bulk coupling for the correct determination of the time dependence of the bulk viscous pressure.
Highlights
Relativistic hydrodynamics plays an important role in modeling of relativistic heavy-ion collisions [1,2,3,4,5,6,7,8,9,10,11,12,13]
We argue that the improved description of dissipative processes can be achieved if one uses either the complete second-order approaches or anisotropic hydrodynamics
We show that anisotropic hydrodynamics (aHydro) describes the evolution of the bulk pressure much better than the dissipative hydrodynamics based on Eqs. (7), (8), or (9)
Summary
Relativistic hydrodynamics plays an important role in modeling of relativistic heavy-ion collisions [1,2,3,4,5,6,7,8,9,10,11,12,13]. In this note we analyse simple models describing the early stages of relativistic heavy-ion collisions and point out difficulties one may encounter in the application of dissipative hydrodynamics [16]. We connect these problems with an incomplete character of various computational schemes which are used to derive the viscous hydrodynamic equations. [17, 18] we studied the effects connected with the shear viscosity and showed that recent formulations of second-order viscous hydrodynamics [20] agree better with the exact solutions of the kinetic equation than the standard Israel-Stewart approach [1, 2].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
