Experimental verification of theoretical equations for acoustic radiation force on compressible spherical particles in traveling waves.


Journal Article

Acoustophoresis uses acoustic radiation force to remotely manipulate particles suspended in a host fluid for many scientific, technological, and medical applications, such as acoustic levitation, acoustic coagulation, contrast ultrasound imaging, ultrasound-assisted drug delivery, etc. To estimate the magnitude of acoustic radiation forces, equations derived for an inviscid host fluid are commonly used. However, there are theoretical predictions that, in the case of a traveling wave, viscous effects can dramatically change the magnitude of acoustic radiation forces, which make the equations obtained for an inviscid host fluid invalid for proper estimation of acoustic radiation forces. To date, experimental verification of these predictions has not been published. Experimental measurements of viscous effects on acoustic radiation forces in a traveling wave were conducted using a confocal optical and acoustic system and values were compared with available theories. Our results show that, even in a low-viscosity fluid such as water, the magnitude of acoustic radiation forces is increased manyfold by viscous effects in comparison with what follows from the equations derived for an inviscid fluid.

Full Text

Cited Authors

  • Johnson, KA; Vormohr, HR; Doinikov, AA; Bouakaz, A; Shields, CW; López, GP; Dayton, PA

Published Date

  • May 17, 2016

Published In

Volume / Issue

  • 93 / 5

Start / End Page

  • 053109 -

PubMed ID

  • 27300980

Pubmed Central ID

  • 27300980

Electronic International Standard Serial Number (EISSN)

  • 2470-0053

International Standard Serial Number (ISSN)

  • 2470-0045

Digital Object Identifier (DOI)

  • 10.1103/physreve.93.053109


  • eng