Title :
Axisymmetric analysis of a tube-type acoustic levitator by a finite element method
Author_Institution :
Dept. of Appl. Electron., Sci. Univ. of Tokyo, Japan
Abstract :
A finite element approach was taken for the study of the sound field and positioning force in a tube-type acoustic levitator. An axisymmetric model, where a rigid sphere is suspended on the tube axis, was introduced to model a cylindrical chamber of a levitation tube furnace. Distributions of velocity potential, magnitudes of positioning force, and resonance frequency shifts of the chamber due to the presence of the sphere were numerically estimated in relation to the sphere´s position and diameter. Experiments were additionally made to compare with the simulation. The finite element method proved to be a useful tool for analyzing and designing the tube-type levitator.<>
Keywords :
acoustic field; aerospace simulation; finite element analysis; materials handling; materials preparation; position control; radiation pressure; ultrasonic applications; axisymmetric analysis; axisymmetric mode; cylindrical chamber; finite element method; levitation tube furnace; positioning force; resonance frequency shifts; rigid sphere; simulation; sound field; space borne materials processing; suspended; tube axis; tube-type acoustic levitator; tube-type levitator; velocity potential; Finite element methods; Frequency estimation; Furnaces; Gases; Levitation; Materials processing; Resonance; Resonant frequency; Space shuttles; Space technology;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
