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  Swimming by reciprocal motion at low Reynolds number

Qiu, T., Lee, T.-C., Mark, A. G., Morozov, K. I., Muenster, R., Mierka, O., et al. (2014). Swimming by reciprocal motion at low Reynolds number. Nature Communications, 5: 5119, pp. 1-8. doi:10.1038/ncomms6119.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000B-04A1-A Version Permalink: https://hdl.handle.net/21.11116/0000-000E-4ACC-A
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Creators

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 Creators:
Qiu, Tian, Author
Lee, Tung-Chun, Author
Mark, Andrew G., Author
Morozov, Konstantin I., Author
Muenster, Raphael, Author
Mierka, Otto, Author
Turek, Stefan, Author
Leshansky, Alexander M., Author
Fischer, Peer1, Author                 
Affiliations:
1Max Planck Institute for Medical Research, Max Planck Society, ou_1125545              

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 Abstract: Biological microorganisms swim with flagella and cilia that execute nonreciprocal motions for low Reynolds number (Re) propulsion in viscous fluids. This symmetry requirement is a consequence of Purcell’s scallop theorem, which complicates the actuation scheme needed by microswimmers. However, most biomedically important fluids are non-Newtonian where the scallop theorem no longer holds. It should therefore be possible to realize a microswimmer that moves with reciprocal periodic body-shape changes in non-Newtonian fluids. Here we report a symmetric ‘micro-scallop’, a single-hinge microswimmer that can propel in shear thickening and shear thinning (non-Newtonian) fluids by reciprocal motion at low Re. Excellent agreement between our measurements and both numerical and analytical theoretical predictions indicates that the net propulsion is caused by modulation of the fluid viscosity upon varying the shear rate. This reciprocal swimming mechanism opens new possibilities in designing biomedical microdevices that can propel by a simple actuation scheme in non-Newtonian biological fluids.

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Language(s): eng - English
 Dates: 2014-05-192014-09-012014-11-04
 Publication Status: Published online
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/ncomms6119
BibTex Citekey: Qiu2014NatComm
URI: https://pubmed.ncbi.nlm.nih.gov/25369018/
 Degree: -

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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
 Creator(s):
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 5 Sequence Number: 5119 Start / End Page: 1 - 8 Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723