Transformation of a submerged flat jet under strong transverse magnetic field

Abstract

A duct flow generated by a planar jet at the inlet and affected by a magnetic field perpendicular to the jet's plane is analyzed in high-resolution numerical simulations. The case of very high Reynolds and Hartmann numbers is considered. It is found that the flow structure is drastically modified in the inlet area. It becomes determined by three new planar jets oriented along the magnetic field lines: two near the walls and one in the middle of the duct. The downstream evolution of the flow includes the Kelvin-Helmholtz instability of the jets and slow decay of the resulting quasi-two-dimensional turbulence.

Experimental study of submerged liquid metal jet in a rectangular duct in a transverse magnetic field

“…The closest we can find to a study of MHD jets in a wall-bounded domain is the recent works of Krasnov et al. (2021) and Belyaev et al. (2021), in which transformation of a planar jet in a transverse magnetic field is analysed.…”

“…The only computational work addressing the conclusions of Davidson (1995) concerning the transformation of a round jet by a transverse magnetic field was the large eddy simulations of Kim & Choi (2004). The closest we can find to a study of MHD jets in a wall-bounded domain is the recent works of Krasnov et al (2021) and Belyaev et al (2021), in which transformation of a planar jet in a transverse magnetic field is analysed.…”

“…The simulations are performed in long computational domains on computational grids consisting of 2304 × 384 2 grid points. The numerical scheme described in our earlier works, such as Krasnov et al (2021) and Zikanov et al (2019), is used. Further details of the numerical procedure will be provided in a future publication by the authors of this paper.…”

“…The numerical scheme described in our earlier works, such as Krasnov et al. (2021) and Zikanov et al. (2019), is used.…”