Anomalous Microfluidic Phonons Induced by the Interplay of Hydrodynamic Screening and Incompressibility
Fluid Dynamics
2010-08-10 v1
Abstract
We investigate the acoustic normal modes ("phonons") of a 1D microfluidic droplet crystal at the crossover between 2D flow and confined 1D plug flow. The unusual phonon spectra of the crystal, which arise from long-range hydrodynamic interactions, change anomalously under confinement. The boundaries induce weakening and screening of the interactions, but when approaching the 1D limit we measure a marked increase in the crystal sound velocity, a sign of interaction strengthening. This non-monotonous behavior of the phonon spectra is explained theoretically by the interplay of screening and plug flow.
Keywords
Cite
@article{arxiv.1008.1473,
title = {Anomalous Microfluidic Phonons Induced by the Interplay of Hydrodynamic Screening and Incompressibility},
author = {Tsevi Beatus and Roy Bar-Ziv and Tsvi Tlusty},
journal= {arXiv preprint arXiv:1008.1473},
year = {2010}
}
Comments
http://link.aps.org/doi/10.1103/PhysRevLett.99.124502 http://www.weizmann.ac.il/complex/tlusty/papers/PhysRevLett2007.pdf