Laboratoire de Mécanique des Fluides et d’Acoustique - UMR 5509

LMFA - UMR 5509
Laboratoire de Mécanique des Fluides et d’Acoustique
Lyon
France

Numerical investigation of velocity fields in fusion plasmas

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.

Associated publications :

Article dans Phys. Rev. Fluids (2020)

Scaling laws in axisymmetric magnetohydrodynamic duct flows

Alexandre Poyé, Olivier Agullo, Nicolas Plihon, Wouter Bos, Victor Desangles & Guillaume Bousselin

We report on a numerical study of axisymmetric flow of liquid metal in a circular duct with a rectangular cross section. The flow is forced through the combination of an axial magnetic field and (...)

Lire la suite

Article dans Phys. Plasmas (2018)

On the role and value of $\beta$ in incompressible MHD simulations

Robert Chahine & Wouter J. T. Bos

The parameter $\beta$, defined as the ratio of the pressure to the square of the magnetic field, is widely used to characterize astrophysical and fusion plasmas. However, in the dynamics of a (...)

Lire la suite

Article dans Phys. Plasmas (2015)

Dynamic equilibria and magnetohydrodynamic instabilities in toroidal plasmas with non-uniform transport coefficients

Shimpei Futatani, Jorge A. Morales & Wouter J. T. Bos

It can be shown that in the presence of a toroidal magnetic field induced by poloidal coils, combined with the electromagnetic field induced by a central solenoid, no static equilibrium is (...)

Lire la suite

Article dans Phys. Plasmas (2015)

Magnetohydrodynamically generated velocities in confined plasma

Jorge A. Morales, Wouter J. T. Bos, Kai Schneider & David C. Montgomery

We investigate by numerical simulation the rotational flows in a toroid confining a conducting magnetofluid in which a current is driven by the application of externally supported electric and (...)

Lire la suite

Article dans Phys. Plasmas (2015)

Modelling of edge localised modes and edge localised mode control

G. T. A. Huijsmans, C. S. Chang, N. Ferraro, L. Sugiyama, F. Waelbroeck, X. Q. Xu, A. Loarte & S. Futatani

Edge Localised Modes (ELMs) in ITER Q = 10 H-mode plasmas are likely to lead to large transient heat loads to the divertor. To avoid an ELM induced reduction of the divertor lifetime, the large (...)

Lire la suite

Article dans J. Comput. Phys. (2014)

Simulation of confined magnetohydrodynamic flows with Dirichlet boundary conditions using a pseudo-spectral method with volume penalization

Jorge A.Morales, Matthieu Leroy, Wouter J. T. Bos & Kai Schneider

A volume penalization approach to simulate magnetohydrodynamic (MHD) flows in confined domains is presented. Here the incompressible visco-resistive MHD equations are solved using parallel (...)

Lire la suite

Article dans Fluid Dyn. Res. (2014)

Self-organization of helically forced MHD flow in confined cylindrical geometries

Malcolm Roberts, Matthieu Leroy, Jorge Morales, Wouter Bos & Kai Schneider

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 (...)

Lire la suite

Article dans Plasma Phys. Control. Fusion (2014)

The effect of toroidicity on reversed field pinch dynamics

Jorge A. Morales, Wouter J. T. Bos, Kai Schneider & David C. Montgomery

The influence of the curvature of the imposed magnetic field on reversed field pinch dynamics is investigated by comparing the flow of a magnetofluid in a torus with aspect ratio 1.83, with the (...)

Lire la suite

2012

Morales J, Bos WJT, Schneider K, Montgomery D. Intrinsic rotation of toroidally confined magnetohydrodynamics. Phys. Rev. Lett.. 2012;109:175002.