Speaker
Chiho Nonaka
(Nagoya University)
Description
Currently a possible origin of "Mach-Cone-like structure" is regarded as triangular
flow and higher harmonics which are produced through event-by-event fluctuated initial states, which is a push to implement effects of event-by-event fluctuations
in the initial conditions of relativistic hydrodynamic models.
When the hydrodynamic simulation is performed with initial conditions with the
event-by-event fluctuation, shock-wave capturing schemes should be used to describe
the hydrodynamic expansion correctly.
Here we develop a fast numerical scheme for causal relativistic hydrodynamics
with dissipation for analyses of relativistic high energy collisions, which is based on
Ref. [1]. This shock-wave capturing scheme for solving relativistic viscous hydrodynamic
equation suffers less artificial dissipative effect and is more suitable for physical
viscosity analyses, compared to SHASTA, Kurganov-Tadmor (KT) and
rHLLE schemes which are mainly used in current analyses based on
hydrodynamic models.
Using the relativistic viscous hydrodynamic model first we evaluate the viscosity
effect in collective flow such as elliptic flow, triangular flow and higher harmonics.
In particular, we investigate the time evolution of them and discuss the relation
between the initial geometry and final states.
Author
Chiho Nonaka
(Nagoya University)
Co-authors
Dr
Makoto Takamoto
(Max-Planck Institute for Nuclear Physics)
Yukinao Akamatsu
(Nagoya University)
