Magnetic field effects on mechanical behaviour of ferrosuspensions

Abstract

In a measuring cell of a rotational magnetorheometer a rheological investigation of a number of ferrosuspensions is carried out over wide ranges of their concentration, temperature, intensity and orientation of the magnetic field. The obtained data are correlated by a new universal magnetorheological characteristic invariant for the ferrosuspension type and temperature, intensity and orientation of the external magnetic field. An experimental investigation is made of peculiarities of the mechanical behaviour of ferrosuspension shear flows in a coaxial cylinder system, with their internal structure dynamically controlled by a rotating magnetic field. Some estimates are made of the momentum transfer mechanism in ferrosuspensions affected by magnetic and shear fields.