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  Self-excited oscillatory dynamics of capillary bridges in electric fields

Klingner, A., Herminghaus, S., & Mugele, F. (2003). Self-excited oscillatory dynamics of capillary bridges in electric fields. Applied Physics Letters, 82(23), 4187-4189. doi:10.1063/1.1580995.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-A9EA-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-A9EB-E
Genre: Journal Article

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 Creators:
Klingner, Anke1, Author
Herminghaus, Stephan2, Author              
Mugele, Frieder, Author
Affiliations:
1External Organizations, ou_persistent22              
2Group Granular matter and irreversibility, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063306              

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 Abstract: We studied the stability of capillary bridges between flat, parallel, and dielectrically coated electrodes as a function of the voltage applied between them. The stability limits of the capillary bridge state and the state consisting of two separated droplets are shifted with respect to ordinary capillary hysteresis at zero voltage. Surprisingly, we found that the system can oscillate periodically between the two states within a certain range of applied voltage and electrode separation. These oscillations could be applied to promote mixing in electrowetting-based microfluidic devices. We present a model based on the balance between interfacial and electrostatic energies, which explains the experimental findings quantitatively.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1063/1.1580995
BibTex Citekey: klingner_self-excited_2003
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Title: Applied Physics Letters
Source Genre: Journal
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Publ. Info: Melville, NY : American Institute of Physics
Pages: - Volume / Issue: 82 (23) Sequence Number: - Start / End Page: 4187 - 4189 Identifier: Other: 0003-6951
CoNE: https://pure.mpg.de/cone/journals/resource/954922836223