Delft University of Technology, Laboratory for Aero & Hydrodynamics, Leeghwaterstraat 21, 2628 CD Delft, The Netherlands.
Ultrason Sonochem. 2013 Jan;20(1):502-9. doi: 10.1016/j.ultsonch.2012.04.014. Epub 2012 May 12.
The flow in a confined container induced by an ultrasonic horn is measured by Particle Image Velocimetry (PIV). This flow is caused by acoustic streaming and highly influenced by the presence of cavitation. The jet-like experimentally observed flow is compared with the available theoretical solution for a turbulent free round jet. The similarity between both flows enables a simplified numerical model to be made, whilst the phenomenon is very difficult to simulate otherwise. The numerical model requires only two parameters, i.e. the flow momentum and turbulent kinetic energy at the position of the horn tip. The simulated flow is used as a basis for the calculation of the time required for the entire liquid volume to pass through the active cavitation region.
采用粒子图像测速法（PIV）测量了超声变幅杆在受限容器中产生的流动。这种流动是由声流引起的，并且受到空化的强烈影响。实验观察到的射流与湍流自由圆射流的现有理论解进行了比较。两种流之间的相似性使得可以建立简化的数值模型，而否则很难模拟该现象。数值模型仅需要两个参数，即变幅杆尖端位置的流动力和湍流动能。所模拟的流动用作计算整个液体体积通过活性空化区域所需时间的基础。
