Investigations in the physical mechanism of sonocrystallization.

摘要: This paper addresses the issue of mechanistic aspects sonocrystallization with approach coupling experiments simulations bubble dynamics. The major experimental result our study is that, as compared to a mechanically agitated crystallization system, dominant crystal size (or median) distribution (CSD) systems smaller, but span CSD larger. influenced by nucleation rate and growth rate. nature convection in medium found be crucial factor. In uniform velocity field prevails volume, due which both reduce. sonicated system different kind. has two components, viz. microturbulence micro-convection), continuous oscillatory motion liquid induced radial cavitation bubble, shock waves, are discrete, high pressure amplitude waves emitted bubble. These components have impact on process their nature. Shock increase microtubulence governs nuclei. However, effect more marked than micro-convection). Nucleation shows an order magnitude rise sonication, while (and hence size) reduces sonication system.