The ESA Business Incubation Centre (BIC) Lazio start-up company Wixta exploits the particular hydrodynamic cavitation phenomenon.
The cavitation is the formation of vapour cavities – small liquid-free "bubbles" in a liquid – that are the consequence of forces acting upon the liquid. They usually are formed when a liquid is subjected to rapid pressure changes. When put under a subsequent higher pressure the cavities collapse and release large amount of energy which can generate intense shock waves. This is most often an undesirable occurrence, in particular for mechanical machinery like propellers and pumps, where it causes a great deal of noise, possible damage to components, vibrations, and a loss of efficiency.