Separation and Concentration of Particles in Fluid Using Ultrasonic Standing Wave


Article Preview

This paper presents the theory, design, and evaluation of a smart device for the enhanced separation of particles mixed in fluid. The smart device takes advantage of the ultrasonic standing wave, which was generated by the operation of a piezoceramic PZT patch installed in the smart device. The details of the device design including the electro-acoustical modelling for separation and PZT transducer are described at first. Based on this design, the separation device was fabricated and evaluated. In the experiments, an optical camera with a zoom lens was used to monitor the position of particles within the separation channel layer in the device. The electric impedance of the PZT patch bonded on the separation device was measured .The device shows a strong levitation and separation force against 50μm diameter particles mixed with water at the separation channel in the device. Experimental results also showed that the device can work at both heavy and light sand particles mixed with water due to the generated standing wave field in the separation channel.



Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi




Y. S. Lee and J. Kwon, "Separation and Concentration of Particles in Fluid Using Ultrasonic Standing Wave", Key Engineering Materials, Vols. 321-323, pp. 63-66, 2006

Online since:

October 2006




[1] Hawkes J. J. and Coakley W. T. (2001). Force field particle filter, combining ultrasound standing waves and laminar flow. Sensors and Actuators B, 75, 213-222.


[2] Hill M., Shen Y., Hawkes J. J. (2002). Modelling of layered resonators for ultrasonic separation. Ultrasonics, 40, 385-392.


[3] Desilets C. S., Fraser J. D. and Kino G. S. (1978). The design of efficient broad-band piezoelectric transducers. IEEE Trans. On Sonics and Ultrasonics, 25(3), 115-125.