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The Taylor-vortex dynamo

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The Taylor vortex dynamo

Christophe Gissinger1

24 rue Lhomond, 75005 PARIS [email protected]

The generation of a magnetic field by dynamo action in a Taylor-vortex flow is investigated numerically.

I first discuss how the Taylor vortices generate a spatially subharmonic dynamo, for which the axial wavelength of the magnetic field is twice the one of the flow pattern. Then, I investigate for the first time the influence of the Reynolds number and the turbulent fluctuations on the structure and the onset of the Taylor-Couette dynamo. Finally, based on the subharmonic nature of this system, I propose new configurations which could be relevant for future laboratory experiments.

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