This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1088/1367-2630/16/6/063029 in citations.
Please use the identifier: http://hdl.handle.net/2128/11502 in citations.
Mode coupling of phonons in a dense one-dimensional microfluidic crystal
Mode coupling of phonons in a dense one-dimensional microfluidic crystal
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...
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Personal Name(s): | Fleury, Jean-Baptiste (Corresponding Author) |
---|---|
Schiller, Ulf D / Thutupalli, Shashi / Gompper, Gerhard / Seemann, Ralf | |
Contributing Institute: |
Theorie der Weichen Materie und Biophysik; IAS-2 Theorie der Weichen Materie und Biophysik; ICS-2 |
Published in: | New journal of physics, 16 (2014) 6, S. 063029 - |
Imprint: |
[Bad Honnef]
Dt. Physikalische Ges.
2014
|
DOI: |
10.1088/1367-2630/16/6/063029 |
Document Type: |
Journal Article |
Research Program: |
Soft Matter Composites |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/11502 in citations.
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. |