Parametric Excitation and Suppression of Oscillations at the Interfaces of Continua for the Processes Control: Jet and Film Flows, Granular Media, Flow in a Channel with Phase Change

The problem is important for the practical applications in three aspects: 1. Excitation of parameter oscillations in continua in touch with necessity of intensification of various technological and technical processes: heat and mass transfer, mixing, decreasing of viscosity, improving of quality for crystallizating metal and many other phenomena. 2. Excitation of parameter oscillations in touch with nesessity of disintegration of jet and film flows: air spray, spray-coating, metal spraying, dispergation and granulation of materials (e.g. particles’ producing from molten metals), etc. 3. Suppression of parameter oscillations for stabilization of unstable regimes and processes: jet-drop and film screens for protection of diaphragm of experimental thermonuclear reactor, thermal instability and control of fusion reactor, control of electromechanical and electrochemical instabilities, combustion stability, decreasing of hydrodynamic and acoustic resistance, etc. In some cases, parametric control makes possible for not only intensification of processes but also for operation of the processes that are impossible without parametric control.It was considered a lot of different as linear as well as nonlinear model situations. As a result there were obtained some interesting regularities of parametric wave excitation and suppression in film flows including three new phenomena of parametric film decay: resonance decay, soliton-like decay and shock-wave decay. The phenomena were first theoretically predicted and then experimentally invented and investigated. Based on these new phenomena we developed, created and tested the prospective dispergators and granulators for some metals and other materials.