Journal Article

FZJ-2014-04728

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Mode coupling of phonons in a dense one-dimensional microfluidic crystal

Fleury, J.-B. (Corresponding Author) ; Schiller, U. D. ; Thutupalli, S. ; Gompper, G.FZJ* ; Seemann, R.

2014
Dt. Physikalische Ges. [Bad Honnef]

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Please use a persistent id in citations: http://hdl.handle.net/2128/11502  doi:10.1088/1367-2630/16/6/063029

Abstract: Long-living coupled transverse and longitudinal phonon modes are explored in dense, regular arrangements of flattened microfluidic droplets. The collective oscillations are driven by hydrodynamic interactions between the confined droplets and can be excited in a controlled way. Experimental results are quantitatively compared to simulation results obtained by multi-particle collision dynamics. The observed transverse modes are acoustic phonons and obey the predictions of a linearized far-field theory. The longitudinal modes arise from a nonlinear mode coupling due to the lateral variation of the confined flow field. The proposed mechanism for the nonlinear excitation is expected to be relevant for hydrodynamic motion in other crowded non-equilibrium systems under confinement.

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Contributing Institute(s):

1. Theorie der Weichen Materie und Biophysik (IAS-2)
2. Theorie der Weichen Materie und Biophysik (ICS-2)

Research Program(s):

1. 451 - Soft Matter Composites (POF2-451) (POF2-451)

Appears in the scientific report 2014

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Database coverage:
; ; ; ; Current Contents - Social and Behavioral Sciences ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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