Numerical Simulation of Thin-Film MHD Flow for Nonuniform Conductivity Walls

Liquid metals offer unique properties and their use in a nuclear fusion reactor, both as confined flows free-surface flow, is widely studied the community. The interaction between this conductive fluid tokamak magnetic fields leads to magnetohydrodynamic (MHD) phenomena that influence flow features. To properly design components employ liquid metals, it necessary accurately predict these features, although efforts have been made development, mature code specifically customized simulate MHD still unavailable. In work, general purpose computational dynamics ANSYS CFX 18.2 validated for thin-film with insulated walls up Ha=1000 several values of characteristic width/thickness ratio, comparing results theoretical relation available literature. For all cases considered, maximum integral error found be below 10%. Successively, used investigate chute film ratio equal 0.1 Ha=300. Uniform nonuniform wall electrical conductivity are considered latter modeled by placing on side back localized regions different conductivity. negligible effect global when lateral insulated, similarly what observed analogous bounded flow. Contrariwise, an electrically enhance jet modify Hartmann layer structure.