title: Symmetrization of a polygonal hollow-core vortex through beat-wave resonance.
abstract: We report on the symmetrization phenomenon of a hollow-core vortex in shallow liquid conditions. This phenomenon accompanies the transition of m wave into (m+1) wave and involves a beat-wave resonance that mediates energy transfer between the background flow and the vortex core. It is shown that this beat wave has a frequency m/(m-1)times the frequency of the parent m wave.
authors: Department of Mechanical Engineering, McGill University, Montreal, Quebec H3A 2K6, Canada. haitabd@hotmail.com
authors: Hamid
authors: H
authors: Ait Abderrahmane
authors: Kamran
authors: K
authors: Siddiqui
authors: Georgios H
authors: GH
authors: Vatistas
authors: Mohamed
authors: M
authors: Fayed
authors: Hoi Dick
authors: HD
authors: Ng