Influence of shear viscosity on the correlation between the triangular flow and initial spatial triangularity

TL;DR

This paper investigates how shear viscosity affects the correlation between triangular flow and initial spatial triangularity in hydrodynamic models, revealing that viscosity weakens this correlation.

Contribution

It demonstrates that shear viscosity reduces the correlation between triangular flow and initial triangularity, highlighting the role of fluid evolution in flow development.

Findings

Triangular flow is weakly correlated with initial triangularity in ideal fluids.

Viscosity significantly diminishes the flow-triangularity correlation.

Triangularity during fluid evolution also influences triangular flow.

Abstract

In a hydrodynamic model, with fluctuating initial conditions, the correlation between triangular flow and initial spatial triangularity is studied. The triangular flow, even in ideal fluid, is only weakly correlated with the initial triangularity. The correlation is largely reduced in viscous fluid. Elliptic flow on the other hand appears to be strongly correlated with initial eccentricity. Weak correlation between triangular flow and initial triangularity indicate that a part of triangular flow is unrelated to initial triangularity. Triangularity acquired during the fluid evolution also contributes to the triangular flow.