We study the event-by-event generation of flow vorticity in the BNL Relativistic Heavy Ion Collider Au+Au collisions and CERN Large Hadron Collider Pb+Pb collisions by using the hijing model. Different definitions of the vorticity field and velocity field are considered. A variety of properties of the vorticity are explored, including the impact parameter dependence, the collision energy dependence, the spatial distribution, the event-by-event fluctuation of the magnitude and azimuthal direction, and the time evolution. In addition, the spatial distribution of the flow helicity is also studied.
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Deng et al. (2016) studied this question.
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