Open AccessEXPERIMENTAL INVESTIGATION AND NUMERICAL ANALYSIS ON ACOUSTIC LEVITATION
Author(s) -
Wenjie Xie,
Chongde Cao,
Wei Bing-Bo
Publication year - 1999
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.48.250
Subject(s) - acoustic levitation , levitation , acoustics , materials science , planar , conical surface , transducer , ultrasonic sensor , magnetostriction , boundary element method , spheres , finite element method , surface (topology) , optics , physics , magnet , magnetic field , computer science , geometry , computer graphics (images) , quantum mechanics , astronomy , composite material , thermodynamics , mathematics
A single-axis acoustic levitator driven by a magnetostrictive ultrasonic transducer was developed, which can stably levitate metallic, semiconducting and organic materials as dense as 11.3g/cm3 in ground-based laboratory. Two types of resonant chambers were investigated by using boundary element approachin order to well understand the effect of chamber geometry on the sound field and, more importantly, on the capability and stability of acoustic levitation. The calculated results and experimental research indicate that the chamber possessing both a planar and a conical reflecting surface can produce radial positioning forces at the lowest mode. This makes its positioning capability larger than that of the chamber with only a planar reflecting surface.