Skip to main content
Article thumbnail
Location of Repository

Eccentricity effects on acoustic radiation from a spherical source suspended within a thermoviscous fluid sphere

By S.M. Hasheminejad and M. Azarpeyvand


Acoustic radiation from a spherical source undergoing angularly periodic axisymmetric harmonic surface vibrations while eccentrically suspended within a thermoviscous fluid sphere, which is immersed in a viscous thermally conducting unbounded fluid medium, is analyzed in an exact fashion. The formulation uses the appropriate wave-harmonic field expansions along with the translational addition theorem for spherical wave functions and the relevant boundary conditions to develop a closed-form solution in form of infinite series. The analytical results are illustrated with a numerical example in which the vibrating source is eccentrically positioned within a chemical fluid sphere submerged in water. The modal acoustic radiation impedance load on the source and the radiated far-field pressure are evaluated and discussed for representative values of the parameters characterizing the system. The proposed model can lead to a better understanding of dynamic response of an underwater acoustic lens. It is equally applicable in miniature transducer analysis and design with applications in medical ultrasonics

Topics: QC
Year: 2003
OAI identifier:
Provided by: e-Prints Soton

Suggested articles


  1. (1986). 2nd ed.
  2. (1995). Acoustic interaction forces between two fluid spheres in an acoustic field," doi
  3. (1997). Acoustic point source scattering by a spherical elastic shell submerged beneath a free surface," doi
  4. (1973). Acoustic radiation from a spherical source embedded eccentrically within a fluid sphere," doi
  5. (1991). Acoustic resonme frequency shifts in a spherical cavity with an eccentric inner small sphere," doi
  6. (1995). Acoustic scattering by a pair of spheres," doi
  7. (1995). Acoustic scattering by an airbubble new the sea surface,"
  8. (1997). Acoustic scattering of a plane wave by two spherical elastic shells above the coincidence irequency," doi
  9. (2009). Authorized licensed use limited to: UNIVERSITY OF SOUTHAMPTON. Downloaded on
  10. (1999). Azarpeyvand was borne in Tehran, Iran, in 1981. He was among the top student entries through the National Iranian Higher Education Exam. Since
  11. (1962). Hasheminejad was borne in
  12. (1993). Modal impedance for two spheres in a thermoviscous fluid," doi
  13. (1998). Modal impedances for a spherical source in a fluid-tilled spherical cavity embedded within a fluidintiltrated elastic porous medium," doi
  14. (1987). Numend Recipes. doi
  15. (1996). Sound scattering by a spherical object near a hard flat bottom," doi
  16. (1972). Thermoviscous effects on acoustic Scattering by thermelastic solid cylinders and spheres,"
  17. (1983). Ultrasonic scattering from spherical shells including viscous and thermal effects," doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.