Numerical simulation of a round jet in the presence of an axial magnetic field

D Krasnov (1) , Yu Kolesnikov (1) , T Boeck (1)

1 TU - Technische Universität Ilmenau

We report numerical simulations of a submerged round jet of conducting liquid issuing into a square duct in the presence of a uniform axial magnetic field. Starting from a quiescent initial condition, the spatial development of the jet is simulated until the transition or breakup zone is no longer evolving in space or the jet has reached the outlet while remaining intact. By increasing the magnetic field strength, the transition length of the jet grows and breakup can eventually be completely suppressed within the computational domain. For even stronger fields the laminar jet becomes unsteady again, which is presumably caused by a MHD pinching mechanism.

Mots clés: direct numerical simulation; jet flow; flow instability

Domaines: Sciences de l'ingénieur [physics]

D Krasnov, Yu Kolesnikov, T Boeck. Numerical simulation of a round jet in the presence of an axial magnetic field. 8th International Conference on Electromagnetic Processing of Materials, Oct 2015, Cannes, France. ⟨hal-01333519⟩