Radiation force acting on an absorbing cylinder placed in an incident plane progressive acoustic field

The radiation force function Yp for two viscoelastic polymeric cylinders suspended in an inviscid fluid in a plane incident sound (or ultrasound) field is calculated. The theory is modified to include the effect of hysteresis-type of compressional and shear waves' absorption in the cylinder material. This type of absorption is typical for a wide range of polymeric materials. The fluid-loading and temperature effects on the shape of the radiation force function are also considered. The results of numerical calculations indicate how damping, the fluid surrounding the cylinder, and temperature influence the frequency dependence of the material's scattering properties.