Steady streaming viscometry of Newtonian liquids in microfluidic devices

Giridar Vishwanathan, Gabriel Juarez

Research output: Contribution to journalArticlepeer-review

Abstract

We report a novel technique capable of measuring the kinematic shear viscosity of Newtonian liquids with steady streaming flows in microfluidic devices. This probe-free microrheological method utilizes sub-kilohertz liquid oscillation frequencies around a cylindrical obstacle, ensuring that the inner streaming layer is comparable in size to the cylinder radius. To calibrate the viscometer, the evolution of the inner streaming layer as a function of the oscillation frequency for a liquid of known viscosity is characterized using standard particle tracking techniques. Once calibrated, we show how the steady streaming viscometer can be used to measure low-viscosity liquids.

Original languageEnglish (US)
Article number041701
JournalPhysics of fluids
Volume31
Issue number4
DOIs
StatePublished - Apr 1 2019

ASJC Scopus subject areas

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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