Viscometer for investigating the viscosity of magnetic fluid media

Abstract The rational application of magnetic fluids in various technical systems requires their stability analysis, hydrodynamic particle size, dissipative processes the colloid control. existing viscometers do not fully meet all requirements, particular, they allow research a field given magnitude and certain topography. It is proposed to determine rheological properties using rotary viscometer, which two measuring gaps are structurally designed filled with studied fluid, important for calculating characteristics low viscosity media. device design implements practically homogeneous field, varying within wide range directed perpendicular liquid shear stress. allows steadily maintain rate medium under study, sufficiently large change. A small fluid volume required estimate characteristics. accuracy measurements internal friction force, heating temperature, coaxial cylinders rotation speed inside investigated requirements international standards. Laminar flow process gap described mathematically. This made it possible justify construction geometrical dimensions order increase low-viscosity materials. formulas calculation Newtonian coefficient, stress based on experimental data were obtained.