A Differential Pressure Wave-Based Sensor Setup for the Acoustic Viscosity of Liquids

We investigate a differential sensor setup utilizing acoustic pressure waves, which aims at the determination of the acoustic viscosity (or the second coefficient of viscosity) of highly viscous liquids with shear viscosities in the range of several 100 mPa · s and above. The whole setup is modeled in PSPICE and investigated experimentally. The presented approach is suitable for further miniaturiz...