Short-time inertial response of viscoelastic fluids measured with Brownian motion and with active probes.

Journal Article (Journal Article)

We have directly observed short-time stress propagation in viscoelastic fluids using two optically trapped particles and a fast interferometric particle-tracking technique. We have done this both by recording correlations in the thermal motion of the particles and by measuring the response of one particle to the actively oscillated second particle. Both methods detect the vortexlike flow patterns associated with stress propagation in fluids. This inertial vortex flow propagates diffusively for simple liquids, while for viscoelastic solutions the pattern spreads superdiffusively, depending on the shear modulus of the medium.

Full Text

Duke Authors

Cited Authors

  • Atakhorrami, M; Mizuno, D; Koenderink, GH; Liverpool, TB; MacKintosh, FC; Schmidt, CF

Published Date

  • June 18, 2008

Published In

Volume / Issue

  • 77 / 6 Pt 1

Start / End Page

  • 061508 -

PubMed ID

  • 18643273

Electronic International Standard Serial Number (EISSN)

  • 1550-2376

International Standard Serial Number (ISSN)

  • 1539-3755

Digital Object Identifier (DOI)

  • 10.1103/physreve.77.061508


  • eng