Steady streaming flows in viscoelastic liquids
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.
Keywords
Cite
@article{arxiv.1903.02609,
title = {Steady streaming flows in viscoelastic liquids},
author = {Giridar Vishwanathan and Gabriel Juarez},
journal= {arXiv preprint arXiv:1903.02609},
year = {2019}
}