Modelling of a micro-rheometer in the spectral domain

For online process monitoring purposes, like in oil condition monitoring, in medical analysis or in food production, microsensors can be used to measure the properties of liquids. A liquid is characterized by several parameters with mass density and shear viscosity being of primary importance. The introduced membrane rheometer consisting of a sample cell covered with two Lorentz-force actuated membranes is modelled in the spectral (wavenumbers) doamin. Valuable properties like frequency responses, penetration depths of shear waves, and power dissipation regimes are calculated efficently by the method.