Microspheres, Metamaterials and Manipulation – A Survey of Physical Ultrasonics Research at the National Center for Physical Acoustics

ORAL  · Invited

Abstract

Physical ultrasonics encompasses a broad range of topics from the physics of wave propagation to the physical effects of high intensity sound. This talk will describe multiple lines of research in ultrasonics performed at the National Center for Physical Acoustics at The University of Mississippi. The topics discussed include propagation in complex media, phononic crystals, metasurfaces, inertial cavitation and acoustic manipulation.

*DoE –DENE0008400; DoD SMDC – Polaris, ACPT; NSF EPSCoR RII Grant No. OIA-1632899

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Publication: R. Lirette, J. Mobley, and L. Zhang, Ultrasonic extraction and manipulation of droplets from a liquid-liquid interface, Physical Review Applied, Vol. 12, Article No. 061001 (2019). doi: 10.1103/PhysRevApplied.12.061001
R. Lirette, J. Mobley, Broadband wave packet dynamics of minimally diffractive ultrasonic fields from axicon and stepped fraxicon lenses, Journal of the Acoustical Society of America, Vol. 144, No. 1, pp. 103-108 (2019)
K. B. Bader, J. Mobley, C. C. Church, D. F. Gaitan, The effect of static pressure on the strength of inertial cavitation events, Journal of the Acoustical Society of America Vol. 132, No. 4, pp. 2286-2291 (2012).
J. Mobley and R. E. Heithaus, Ultrasonic properties of a suspension of microspheres supporting negative group velocities, Physical Review Letters, Vol. 99, article no. 124301 (2007).
U. Koju, J. Mobley, Propagation of pulsed ultrasonic fields in a band gap of a two dimensional phononic crystal, Proceedings on Meetings in Acoustics, Vol. 25, article no. 045002 (2015). https://doi.org/10.1121/2.0000191.
22. J. Mobley, K. R. Waters, and J. G. Miller, Causal determination of acoustic group velocity and frequency derivative of attenuation with finite-bandwidth Kramers-Kronig relations, Physical Review E, Vol. 72, No. 1, Article No. 016604 (2005).

Presenters

  • Joel Mobley

    • University of Mississippi

Authors

  • Joel Mobley

    • University of Mississippi