Rheological investigation of concentrated suspensions using a novel in-line Doppler ultrasound method

In this work, a new in-line non-destructive rheological measuring technique was developed and tested in a pilot plant and in industrial scale applicat ions. The method is based on the Ultrasonic Pulsed Echo Doppler technique, in combination with a pressure difference method. The measuring system was installed as a section of the transporting pipe within which is a pre-cryst allization process. The rheological dow properties were derived from the si multaneous recording of the velocity profiles along the tube channel and re lated radial shear stress profiles calculated from the pressure loss in the slit channel. The main advantage of the introduced in-line technique is to allow for the flow behavior characterization of nontransparent. and highly concentrated suspensions.