Short-time inertial response of viscoelastic fluids: observation of vortex propagation.


Journal Article

We probe the response of viscous and viscoelastic fluids on micrometer and microsecond length and time scales using two optically trapped beads. In this way we resolve the flow field, which exhibits clear effects of fluid inertia. Specifically, we resolve the short-time vortex flow and the corresponding evolution of this vortex, which propagates diffusively for simple liquids. For viscoelastic fluids, this propagation is shown to be faster than diffusive and the displacement correlations reflect the frequency-dependent shear modulus of the medium.

Full Text

Duke Authors

Cited Authors

  • Atakhorrami, M; Koenderink, GH; Schmidt, CF; MacKintosh, FC

Published Date

  • November 8, 2005

Published In

Volume / Issue

  • 95 / 20

Start / End Page

  • 208302 -

PubMed ID

  • 16384109

Pubmed Central ID

  • 16384109

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.95.208302


  • eng