Abstract
This paper deals with a non-contact transportation system using ultrasound wave levitation phenomenon. It is the purpose of this paper to verify a relevancy between the transporting direction of the levitated object and the propagating direction of a travelling wave. First, active wave control is introduced for oscillating the flexible beam at high frequency. Then, HSMAC (Highly Simplified Marker And Cell) method is introduced for calculating two-dimensional surface model with incompressible fluid. Finally, the relevancy is verified by the experiment. As a consequence, it is clarified that the propagating direction of a travelling wave is able to be reversed by operating the frequency lower and higher near a resonant frequency, and by adjusting the phase difference to positive or negative. Furthermore, if the levitated object is situated within a viscous boundary layer, the transporting direction of the levitated object is reversed as compared to the propagating direction of a travelling wave.
