Temperature-Dependent Viscosity Model for Silicone Oil and Its Application in Viscous Dampers

Silicone fluids belong to the group of pseudoplastic non-Newtonian with complex rheological characteristics. They are considered in basic and applied researches a wide range industrial applications due their favorable physical thermal properties. One specific field automotive industry is working fluid viscous torsional vibration dampers. For numerical studies design development phase this damping product, it essential have thorough knowledge mathematical description about silicone oil viscosity. In present work, adopted measurement results conducted on polydimethylsiloxane manufactured by Wacker Chemie initial viscosity 1000 Pas (AK 1 000 STAB oil) processed. As result parameter identification nonlinear regression, temperature-dependent curves Carreau–Yasuda model generated. By implementing these sets into Computational Fluid Dynamics (CFD) software, temperature- shear-rate-dependent was tested, using transient flow simulations elementary tube geometries size real damper’s channels filling chambers. The finite volume method provide information developed processes, especial care for resulted pattern, shear rate, timing.