On the pairing instability in helical vortices

【Author】

Hadrien Bolnot;Stéphane Le Dizès;Thomas Leweke;

【Abstract】

<正>The pairing instability in helical vortices is analysed theoretically and experimentally.In the theoretical study,the helical vortices are modelled by an infinite array of vortex rings.The spatiotemporal development of the pairing instability is analysed by linearized DNS as function of the geometric parameters of the vortices and the Reynolds number.In the experimental study,the

【Keywords】

On the pairing instability in helical vortices;DNS;

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