Deformation and impregnation of droplets containing abrasive grains using intense aerial ultrasonic waves

摘要

For efficient impregnation, it is important to improve the wettability between the samples used. However, the traditional impregnation method using ultrasonic waves suffers from the following problems: that the vibration source must be brought into direct contact with the sample and impregnation with liquids with high viscosities is difficult. Also, the method has the possibility that impurities will be mixed in the sample when bringing the ultrasonic vibration source directly into contact with the sample. Therefore, we investigated the use of intense aerial ultrasonic waves as a new noncontact method of impregnating into meshes while observing the extent of the droplet spread. In this study, we observed droplet deformation and impregnation when changing the droplet volume and input power and after installing a sound waveguide for focusing the sound wave. Consequently, we were consequently able to demonstrate the impregnation of droplets into the mesh. (C) 2018 The Japan Society of Applied Physics