Frequency dependence of the acoustic radiation force acting on absorbing cylindrical shells.
The frequency dependence of the radiation force function Y(p) for absorbing cylindrical shells suspended in an inviscid fluid in a plane incident sound field is analysed, in relation to the thickness and the content of their interior hollow region. The theory is modified to include the effect of hysteresis type absorption of compressional and shear waves in the material. The results of numerical calculations are presented for two viscoelastic (lucite and phenolic polymer) materials, with the hollow region filled with water or air indicating how damping and change of the interior fluid inside the shell's hollow region affect the acoustic radiation force. The acoustic radiation force acting on cylindrical lucite shells immersed in a high density fluid (in this case mercury) and filled with water in their hollow region, is also studied.
Mitri
Farid G
FG
National Institute of Health and Medical Research, INSERM Unit 556-Therapeutic Ultrasound Research Laboratory, 151 Cours Albert Thomas, 69424 Lyon Cedex 03, France. mitri@ieee.org
D000042:Absorption / Q000528:radiation effects; D000162:Acoustics; D008961:Models, Structural; D012542:Scattering, Radiation; D014465:Ultrasonics