This is the third work in a series of monographs* written by a col lective group of authors and is devoted to the physical mechanisms of specific ultrasonic technological processes that have already come into general use, as well as those which have just begun to enjoy practical applications. The problems covered in the book are exceedingly important insofar as the understanding of the phys ical mechanisms of ultrasonic processes forms the solitary basis of an intelligent approach to the design of industrial equipment and proper choice of optimum working conditions. The purely em pirical...

Under the action of acoustic vibrations a liquid is converted into the aerosol state at the interface between a gaseous and a liq- uid medium. Acoustic energy can be delivered to the atomization zone either on the liquid side or on the gas side. Ordinarily, when acoustic energy is delivered through the gas, the atomization of the liquid is realized by sonic and low-frequency ultrasonic vibra- tions because high-frequency ultrasound is rapidly damped in prop- agation through gases. But if the acoustic energy is delivered through the liquid, whose damping factor is orders of magnitude smaller...

vi tute of the Academy of Sciences of the USSR. Thus, the book does not contain material on the nonlinear interaction of nonlinear ab- sorption of high-intensity acoustic oscillations in solids, etc. Al- though the main body of the text generally encompasses the results of the author of the given part of the book, the materials of other Soviet and foreign researchers working in the particular field are also incorporated in the interest of clarity and completeness. Part I presents a survey of the results of investigations con- ducted by the author in the nonlinear absorption of, sound in...