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Updated: Dec 22, 2025
06:42
Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
9.9K
Chaotic wave dynamics in weakly magnetized spherical Couette flows.
Ferran Garcia1, Martin Seilmayer1, André Giesecke1
1Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, D-01328 Dresden, Germany.
Chaos (Woodbury, N.Y.)
|May 3, 2020
Summary
Direct numerical simulations reveal complex liquid metal flows between spheres. Varying magnetic fields (Hartmann number) and rotation (Reynolds number) create diverse flow patterns, including multistability and frequency locking.
Area of Science:
- Fluid Dynamics
- Magnetohydrodynamics
- Computational Physics
Background:
- Understanding liquid metal flow dynamics is crucial in various engineering applications.
- The interplay between rotation and magnetic fields significantly influences fluid behavior.
Purpose of the Study:
- To investigate the complex flow patterns of liquid metal between concentric spheres.
- To analyze the effects of varying rotational (Reynolds number) and magnetic field (Hartmann number) parameters.
Main Methods:
- Direct numerical simulations were employed to model the fluid flow.
- Frequency analysis and Poincaré sections were used to characterize temporal dynamics.
Main Results:
- A rich variety of spatial symmetries and temporal behaviors were observed.
- Hopf bifurcations led to flows with two or three independent frequencies.
- Regions of multistability, where two to four different flow types coexist, were identified.
- Period doubling cascades and frequency locking phenomena were documented.
Conclusions:
- The study demonstrates a complex dynamical system driven by rotation and magnetic fields.
- The findings highlight the potential for intricate flow phenomena and multistability in such configurations.
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