Scattering of focused ultrasonic beams by cavities in a solid half-space.
The ultrasonic field generated by a point focused acoustic lens placed in a fluid medium adjacent to a solid half-space, containing one or more spherical cavities, is modeled. The semi-analytical distributed point source method (DPSM) is followed for the modeling. This technique properly takes into account the interaction effect between the cavities placed in the focused ultrasonic field, fluid-solid interface and the lens surface. The approximate analytical solution that is available in the literature for the single cavity geometry is very restrictive and cannot handle multiple cavity problems. Finite element solutions for such problems are also prohibitively time consuming at high frequencies. Solution of this problem is necessary to predict when two cavities placed in close proximity inside a solid can be distinguished by an acoustic lens placed outside the solid medium and when such distinction is not possible.
Department of Civil Engineering and Engineering Mechanics, University of Arizona, Tucson, Arizona 85721, USA.
Ehsan Kabiri
EK
Rahni
Talieh
T
Hajzargarbashi
Tribikram
T
Kundu
D003198:Computer Simulation; D004548:Elasticity; D004867:Equipment Design; D020342:Finite Element Analysis; D005844:Geology / Q000295:instrumentation; D005898:Glass; D008962:Models, Theoretical; D009038:Motion; D009716:Numerical Analysis, Computer-Assisted; D019904:Polymethyl Methacrylate; D011312:Pressure; D011791:Quartz; D012542:Scattering, Radiation; D014159:Transducers; D014465:Ultrasonics / Q000295:instrumentation; D014867:Water
D014867:Water; D011791:Quartz; D019904:Polymethyl Methacrylate