Helically forced MHD flows in confined cylindrical geometries

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.

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⟩

Journal: Fluid Dynamics Research

Date de publication: 25-11-2014

Auteurs:
  • Malcolm Roberts
  • Matthieu Leroy
  • Jorge Morales
  • Wouter J.T. Bos
  • Kai Schneider

Digital object identifier (doi): http://dx.doi.org/10.1088/0169-5983/46/6/061422


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