Rheological properties of magnetic fluid containing fine particles

The paper describes the results of an experimental study of the rheological properties of a magnetic fluid, made up of fine particles in a base, during its flow through flat ducts with various internal cross sections in an applied field. In the absence of a field, the flow is Newtonian. The transition to non-Newtonian flow takes place at approximately the same field intensity for all the duct widths between 0.05 and 0.2 mm, and at a given temperature and duct orientation it depends only on the concentration of the solid phase. In a strong magnetic field the rheological characteristics may depend on the width of the flow channel.