超声降解废水机理及空化气泡运动过程数值模拟

Mechanism of wastewater ultrasonic degradation and numerical simulation of cavitations bubble dynamics

阐述了超声降解废水的机理,并根据以体积作为动力学参数的气泡动力学模型进行数值模拟,结果表明,低频下的空化强度更大,更有利于降解过程,而驱动声压和初始气泡大小则存在一个最佳值,同时与传统的R-P方程作了比较,两个模型模拟结果基本一致,表明本文所用模型也适用于对气泡运动过程的模拟.

This paper set forth the mechanism of wastewater ultrasonic degradation and made numerical simulation for it according to the bubble dynamical model which was based on the volume as the dynamic al parameter. The results showed that at low frequency, the cavitation intensity is bigger and it is more advantageous for the degradation course, but the drive acoustic pressure and initial bubble volume have a group of optimal values. In addition, the paper contrasted this numerical simulation with the traditional R-P equation. It showed that simulation results of the two models were identical and the model in this paper was also fit to simulate the bubble dynamics.