ULTRASONIC VELOCITY IN SUSPENSIONS OF SOLIDS IN SOLIDS - A COMPARISONOF THEORY AND EXPERIMENT

Twelve theoretical models for the ultrasonic velocity in a system cons isting of a solid matrix containing solid spherical inclusions have be en compared with experimental data obtained from the literature. Four of the models failed to predict the experimentally observed minimum in the velocity-inclusion concentration curve, and can therefore only be considered suitable for low-concentration computations. All of the re maining models give qualitative agreement with the experimental system s considered and no one model is obviously superior to the others. The re is a clear need for more high quality experimental data on solid-so lid suspensions.