Gogate Parag R, Wilhelm Anne Marie, Pandit Aniruddha B
Chemical Engineering Division, Institute of Chemical Technology, University of Mumbai, Matunga, Mumbai 400 019, India.
Ultrason Sonochem. 2003 Oct;10(6):325-30. doi: 10.1016/S1350-4177(03)00103-2.
The magnitudes of collapse pressures and temperatures as well as the number of free radicals generated at the end of cavitation events are strongly dependent on the operating parameters of the equipment namely, intensity and frequency of irradiation along with the geometrical arrangement of the transducers and the liquid phase physicochemical properties, which affect the initial size of the nuclei and the nucleation process. In the present work, the effect of these parameters on the collapse pressure generated and the maximum size of the cavity during the cavitation phenomena have been studied using the bubble dynamics equation, which considers the compressibility of the medium and a single bubble in isolation. The different liquid phase properties considered include, liquid vapor pressure, viscosity, bulk liquid temperature, surface tension and nature of dissolved gases (polytropic constant of the gas). The theoretical predictions have been also compared with the experimental results observed in the literature qualitatively and some recommendations have been made for the selection of the operating parameters so as to achieve maximum benefits. The work presented here is novel in sense that no earlier studies have considered the compressibility of the liquid medium and tried to evaluate the effect of all the operating parameters on the cavitational activity.
空化事件结束时产生的崩溃压力和温度的大小以及自由基的数量，强烈依赖于设备的操作参数，即辐照强度和频率，以及换能器的几何排列和液相物理化学性质，这些因素会影响核的初始大小和成核过程。在本工作中，使用考虑介质可压缩性和单个孤立气泡的气泡动力学方程，研究了这些参数对空化现象中产生的崩溃压力和空化腔最大尺寸的影响。所考虑的不同液相性质包括液体蒸气压、粘度、液体整体温度、表面张力和溶解气体的性质（气体的多方常数）。理论预测也与文献中观察到的实验结果进行了定性比较，并对操作参数的选择提出了一些建议，以实现最大效益。这里提出的工作是新颖的，因为没有早期研究考虑过液体介质的可压缩性，并试图评估所有操作参数对空化活性的影响。
