Spatio–temporal dynamics of acoustic cavitation bubble clouds

摘要: Bubble clouds forming in an extended volume of liquid acoustic cavitation show a slowly varying filamentary structure, whose origin is still not completely understood. Experimental observations are reported that provide some characteristics the phenomenon, such as bubble distributions and sound–field measurements. A discussion relevant physical interactions bubbly liquids comprised wave dynamics, Bjerknes drag forces, nucleation coalescence. For describing structure formation process, continuum particle approaches employed. In framework model it shown homogeneous unstable, regions with high concentration emerge course self–concentration process. model, all bubbles treated interacting objects move liquid. This approach complementary to model. It allows inclusion particular features, for instance forces based on nonlinear oscillations. Both models discussed results compared experimentally observed patterns.