Dynamics of nonmagnetic inclusions in a microchannel with a magnetic fluid in an inhomogeneous magnetic field

The article presents the results of studying the dynamics of non-magnetic bubbles and droplets in a magnetic fluid placed in an inhomogeneous magnetic field. Using a digital high-speed system for video recording, the mechanism of the detachment of a non-magnetic droplet from the major part of the magnetic fluid has been considered in detail. It is experimentally demonstrated that the size of formed non-magnetic inclusions in such a magnetic-fluid system does not depend on the flow rate and hydrostatic pressure. The possibility to control the size of non-magnetic liquid and gas inclusions by changing the parameters of magnetic fluid and magnetic field can be used for microdosers or gas meters in microfluidic systems.