Anomalous Microfluidic Phonons Induced by the Interplay of Hydrodynamic Screening and Incompressibility
arXiv:1008.1473 · doi:10.1103/PhysRevLett.99.124502
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.
http://link.aps.org/doi/10.1103/PhysRevLett.99.124502 http://www.weizmann.ac.il/complex/tlusty/papers/PhysRevLett2007.pdf
References in corpus (7)
- Phonons in a one-dimensional microfluidic crystal
- Anomalous hydrodynamic interaction in a quasi-two-dimensional suspension
- Screened hydrodynamic interaction in a narrow channel
- Protein-DNA computation by stochastic assembly cascade
- Screening by symmetry of long-range hydrodynamic interactions of polymers confined in sheets
- Correlated particle dynamics in concentrated quasi-two-dimensional suspensions
- High-Fidelity DNA Sensing by Protein Binding Fluctuations