Tuning upstream swimming of micro-robots by shape and cargo size
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| Format: | Preprint |
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2020
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| _version_ | 1866910380174868480 |
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| author | Daddi-Moussa-Ider, Abdallah Lisicki, Maciej Mathijssen, Arnold J. T. M. |
| author_facet | Daddi-Moussa-Ider, Abdallah Lisicki, Maciej Mathijssen, Arnold J. T. M. |
| contents | The navigation of micro-robots in complex flow environments is controlled by rheotaxis, the reorientation with respect to flow gradients. Here we demonstrate how payloads can be exploited to enhance the motion against flows. Using fully resolved hydrodynamic simulations, the mechanisms are described that allow micro-robots of different shapes to reorient upstream. We find that cargo pullers are the fastest at most flow strengths, but pushers feature a non-trivial optimum as a function of the counter flow strength. Moreover, the rheotactic performance can be maximised by tuning the micro-robot shape or cargo size. These results may be used to control micro-swimmer navigation, but they also apply to rheotaxis in microbial ecology and the prevention of bacterial contamination dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2004_05694 |
| institution | arXiv |
| publishDate | 2020 |
| record_format | arxiv |
| spellingShingle | Tuning upstream swimming of micro-robots by shape and cargo size Daddi-Moussa-Ider, Abdallah Lisicki, Maciej Mathijssen, Arnold J. T. M. Soft Condensed Matter Biological Physics Fluid Dynamics Medical Physics The navigation of micro-robots in complex flow environments is controlled by rheotaxis, the reorientation with respect to flow gradients. Here we demonstrate how payloads can be exploited to enhance the motion against flows. Using fully resolved hydrodynamic simulations, the mechanisms are described that allow micro-robots of different shapes to reorient upstream. We find that cargo pullers are the fastest at most flow strengths, but pushers feature a non-trivial optimum as a function of the counter flow strength. Moreover, the rheotactic performance can be maximised by tuning the micro-robot shape or cargo size. These results may be used to control micro-swimmer navigation, but they also apply to rheotaxis in microbial ecology and the prevention of bacterial contamination dynamics. |
| title | Tuning upstream swimming of micro-robots by shape and cargo size |
| topic | Soft Condensed Matter Biological Physics Fluid Dynamics Medical Physics |
| url | https://arxiv.org/abs/2004.05694 |