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Helically forced MHD flows in confined cylindrical geometries

Abstract : The dynamics of a magnetically forced conducting fluid in confined geometries is studied. A pseudospectral method with volume penalisation is used to solve the resistive magnetohydrodynamic (MHD) equations. A helical magnetic field is imposed via boundary conditions, which generates a response in the velocity field for large enough magnitudes. Different helical structures are observed in the flow depending on the magnitude and direction of the forcing and the cross-sectional geometry of the fluid domain. A computational technique for finding a solenoidal vector field which can be used in complex geometries is also proposed.
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Contributor : Wouter Bos <>
Submitted on : Thursday, June 12, 2014 - 3:40:35 PM
Last modification on : Wednesday, July 8, 2020 - 12:42:06 PM
Long-term archiving on: : Friday, September 12, 2014 - 11:31:27 AM


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Malcolm Roberts, Matthieu Leroy, Jorge Morales, Wouter J.T. Bos, Kai Schneider. Helically forced MHD flows in confined cylindrical geometries. Fluid Dynamics Research, IOP Publishing, 2014, 46, pp.061422. ⟨10.1088/0169-5983/46/6/061422⟩. ⟨hal-01005421⟩



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