Steady streaming flows in viscoelastic liquids

Giridar Vishwanathan, Gabriel Juarez

Research output: Contribution to journalArticlepeer-review

Abstract

We discuss experimental investigations on steady streaming flows of dilute and semi-dilute polymer solutions in microfluidic devices. The effect of non-Newtonian behavior on steady streaming for different model fluids is determined by characterizing the evolution of the inner streaming layer as a function of oscillation frequency using particle tracking velocimetry. We find that steady streaming velocity profiles in constant-viscosity elastic liquids are qualitatively similar to those in Newtonian liquids. Steady streaming velocity profiles in elastic liquids with strong shear thinning, however, display two unique features: (i) a non-monotonic evolution of the inner streaming layer with increasing frequency, first growing then decreasing in width, and (ii) a clear asymmetry in the flow profile at high frequencies.

Original languageEnglish (US)
Article number104143
JournalJournal of Non-Newtonian Fluid Mechanics
Volume271
DOIs
StatePublished - Sep 2019

Keywords

  • Microfluidics
  • Steady streaming
  • Viscoelastic

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Applied Mathematics

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