Most of the existing magnetically confined fusion plasmas move and are turbulent, which is sometimes quite a problem. Indeed, in order to get a nuclear fusion reaction started, and to keep it going, one needs to obtain high temperatures (and densities) and the hot plasma is supposed to be kept in place by a magnetic field.
In our team we study the velocity fields in fusion plasmas of the tokamak and reversed-field-pinch type using fluid models. We have developed an efficient and flexible numerical method to study arbitrarily shaped plasmas confined by solid walls. The method is based on pseudo-spectral techniques combined with an immersed boundary method (PhD Jorge Morales) .
Staff involved : W. Bos, Robert Chahine. Collaboration : Kai Schneider.
Futatani S, Morales J, Bos WJT. Dynamic equilibria and MHD instabilities in toroidal plasmas with non-uniform transport coefficients. Phys. Plasmas. 2015;22:052503.
Morales J, Bos WJT, Schneider K, Montgomery D. Magnetohydrodynamically generated velocities in confined plasma. Phys. Plasmas. 2015;22:042515.
Plihon N, Bousselin G, Palermo F, et al. Flow dynamics and magnetic induction in the von-Karman plasma experiment. J. Plasma Phys.. 2015;81:345810102.
Morales J, Bos WJT, Schneider K, Montgomery D. The effect of Toroidicity on Reversed Field Pinch Dynamics. Plasma Phys. Control. Fusion. 2014;56:095024.
Morales J, Leroy M, Bos WJT, Schneider K. Simulation of confined magnetohydrodynamic flows with Dirichlet boundary conditions using a pseudo-spectral method with volume penalization. J. Comput. Phys.. 2014;274:64–94.
Roberts M, Leroy M, Morales J, Bos WJT, Schneider K. Helically forced MHD flows in confined cylindrical geometries. Fluid Dyn. Res.. 2014;46:061422.
Morales J, Bos WJT, Schneider K, Montgomery D. Intrinsic rotation of toroidally confined magnetohydrodynamics. Phys. Rev. Lett.. 2012;109:175002.