Magnetohydrodynamics around a cylindrical wire carrying electric currents

Vortex shedding phenomenon is closely linked with noise and vibration, many studies that consider the associated environmental or structural safety issues have been conducted. In this study, we have investigated the changes in features of vortex shedding for the case that an electrically conducting fluid flows around a cylinder under circular magnetic fields induced by a line source of electric current. For unsteady laminar flows at Reynolds numbers from 50 to 200, the magnetohydrodynamic simulation was conducted with gradually increasing Stuart number from 0 to 10. The flow features including the drag, lift, and vortex shedding are discussed for different magnetic field patterns (x-directional, y-directional, and circular magnetic fields). The most notable finding is that the drag of the cylinder in a circular magnetic field decreased with increasing magnetic field intensity (drag increases with increasing magnetic field intensity in a uniform horizontal or vertical magnetic field).