Скачать или смотреть Simulation of cavitation bubble collapse

CFD predicted cavitation bubble collapse. Ultrasonic cleaning device was modelled and the collapse of a single bubble in an ultrasonic pressure field was studied using a finite-volume 2D axisymmetrical model. The pressure field was generated with the bottom of a container oscillating at 33 kHz. Spherical air bubble of resonance size was induced into water near the bottom where it violently collapsed. Compressibility of both phases was taken into account and the interface between air and water was captured using Volume-Of-Fluid approach. Although the collapse of just one bubble was studied, the results obtained gave good insight into conditions that happen due to cavitation in a near-wall region of ultrasonic cleaning devices. More on the topic can be found in A. Osterman et al. (2009), Numerical Simulation of a Near-Wall Bubble Collapse in an Ultrasonic Field, Journal of Fluid Science and Technology 4(1): 210-221.