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9 papers · 1 filter
Transition to turbulent dynamo saturation
Kannabiran Seshasayanan, Basile Gallet, Alexandros Alexakis
While the saturated magnetic energy is independent of viscosity in dynamo experiments, it remains viscosity-dependent in state-of-the-art 3D direct numerical simulations (DNS). Ext…
Phoresis in turbulent flows
Vishwanath Shukla, Romain Volk, Mickaël Bourgoin +1
Phoresis, the drift of particles induced by scalar gradients in a flow, can result in an effective compressibility, bringing together or repelling particles from each other. Here,…
Selective control of vortex polarities by microwave field in two robustly synchronized spin-torque nano-oscillators
Yi Li, Xavier de Milly, Olivier Klein +3
Manipulating operation states of coupled spin-torque nano-oscillators (STNOs), including their synchronization, is essential for applications such as complex oscillator networks. I…
Fore-aft asymmetric flocking
Qiu-shi Chen, Aurelio Patelli, Hugues Chaté +2
We show that fore-aft asymmetry, a generic feature of living organisms and some active matter systems, can have a strong influence on the collective properties of even the simplest…
Particles and Fields in Superfluids: Insights from the Two-dimensional Gross-Pitaevskii Equation
Vishwanath Shukla, Rahul Pandit, Marc Brachet
We carry out extensive direct numerical simulations (DNSs) to investigate the interaction of active particles and fields in the two-dimensional (2D) Gross-Pitaevskii (GP) superflui…
Surface-wave Doppler velocimetry in a liquid metal: inferring the bifurcations of the subsurface flow
T. Humbert, S. Aumaître, B. Gallet
We introduce a velocimetry technique based on the Doppler-shift of surface waves propagating between an emitter and a receiver. In the limit of scale separation between the wavelen…