Sonic Drying

Abstract

This paper deals with the application of airborne sonic energy in the drying process. Particular emphasis is placed on the development of the Hartmann-type sound generator for this application. The mechanism of the drying of solids is shown to be a complicated process influenced by many factors. How a sound field can influence these factors and increase the rate of drying is discussed. A description of a typical sonic dryer is given in conjunction with actual applications.