Magnetic field control on radial oscillation behavior of a gas bubble in conductive fluid

The behavior of bubbles in liquid metal is an important aspect of the magnetohydrodynamic. To fully investigate the effects of an uniform magnetic field on a growing or collapsing bubble, based on magnetic hydrodynamics, it is established a modified dimensionless dynamic equation of a radial vibrating gas bubble immersed in a conductive fluid and driven by a sine sound field and exposed to an uniform external magnetic field. The effects of magnetic field on the stability of bubbles nonlinearly oscillating, the temperature and pressure inside the bubble, and fluid cavitation threshold are studied numerically. The numerical results have shown that magnetic field enhances the stability of bubbles nonlinearly vibrating, especially when the magnitude of the electromagnetic force is comparable to the inertial force acting on the bubble interface, it transforms the irregular pulsation of the bubble into a stable regular oscillation; at the same time, the magnetic field causes that the temperature, pressure inside the bubble and liquid cavitation threshold change. It is showed that the magnetic field can be used to regulate and control the movement of the gas bubbles to meet the engineering application requirements.