title: Bistability and chaos in the Taylor-Green dynamo.
abstract: Using direct numerical simulations, we study dynamo action under Taylor-Green forcing for a magnetic Prandtl number of 0.5. We observe bistability with weak- and strong-magnetic-field branches. Both the dynamo branches undergo subcritical dynamo transition. We also observe a host of dynamo states including constant, periodic, quasiperiodic, and chaotic magnetic fields. One of the chaotic states originates through a quasiperiodic route with phase locking, while the other chaotic attractor appears to follow the Newhouse-Ruelle-Takens route to chaos. We also observe intermittent transitions between quasiperiodic and chaotic states for a given Taylor-Green forcing.
authors.affiliation: Department of Physics, Indian Institute of Technology, Kanpur 208016, India. yadav.r.k.87@gmail.com
authors.forename: Rakesh K
authors.initials: RK
authors.lastname: Yadav
authors.forename: Mahendra K
authors.initials: MK
authors.lastname: Verma
authors.forename: Pankaj
authors.initials: P
authors.lastname: Wahi