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  Hydrodynamic ratchet: Controlled motion of a polymer in an alternating microchannel flow

Zhang, Z., Stark, H., & Mikhailov, A. S. (2013). Hydrodynamic ratchet: Controlled motion of a polymer in an alternating microchannel flow. EPL, 104(1): 14002. doi:10.1209/0295-5075/104/14002.

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 Urheber:
Zhang, Zhen1, 2, Autor
Stark, Holger2, Autor
Mikhailov, Alexander S.3, Autor           
Affiliations:
1Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China , ou_persistent22              
2Institut für Theoretische Physik, Technische Universtität Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany , ou_persistent22              
3Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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 Zusammenfassung: Using ratchets, periodic or irregular oscillations can be transformed into steady translational or rotational motions. Here, we consider a model system that operates as a hydrodynamic ratchet. A polymer is placed inside a narrow channel where an oscillating Poiseuille flow is externally created. The ratchet mechanism is implemented by introducing a feedback control for the lateral position of the polymer through which its mobility becomes effectively dependent on the direction of its motion along the channel. We employ the semi-flexible elastic chain modeling for the polymer and use the method of multi-particle collision dynamics to simulate the fluid. We indeed observe directed motion of the polymer and determine the dependence of the propagation velocity on the model parameters.

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Sprache(n): eng - English
 Datum: 2013-09-022013-10-022013-10-242013-10
 Publikationsstatus: Erschienen
 Seiten: 6
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1209/0295-5075/104/14002
 Art des Abschluß: -

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Titel: EPL
  Andere : Europhysics Letters
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Bristol : IoPP
Seiten: - Band / Heft: 104 (1) Artikelnummer: 14002 Start- / Endseite: - Identifikator: Anderer: 0295-5075
CoNE: https://pure.mpg.de/cone/journals/resource/0295-5075