抄録
In field of microfluidics ,it is required to control die flow of liquid at micro or nanoliter volume levels accurately. By using a ferrofluid, the flow of liquid in a microchannel can be controlled by die driving power exerted on the ferro fluid. Hie purpose of study is to investigate die movement of ferrofluid and liquid slug in a capillary tube under magnetic field. The external magnetic field is used to control ferrofluid. However, the study with a ring permanent magnet is not almost done in this field. In this study, flow of ferrofluid and pulled liquid slug have been investigated in die capillary tube under magnetic field generated by die magnet As a result of observing the motion and behaviour of die ferrofluid, die magnetic field exerts an influence on movement of ferrofluid. In addition, die viscosity of liquid slug affects die variation of velocity remarkably.
