Modeling straight and circle swimmers: from single swimmer to collective motion
We propose a simple numerical model for the motion of microswimmers based on the immersed boundary method. The swimmer, either pusher or puller, is represented by a distribution of point forces corresponding to the body and the flagellum. We study in particular the minimal model consisting of only t...
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| Veröffentlicht in: | The European physical journal. E, Soft matter and biological physics Soft matter and biological physics, 2024-11, Vol.47 (11), p.65, Article 65 |
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| container_title | The European physical journal. E, Soft matter and biological physics |
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| creator | Ventrella, Francesco Michele Boffetta, Guido Cencini, Massimo De Lillo, Filippo |
| description | We propose a simple numerical model for the motion of microswimmers based on the immersed boundary method. The swimmer, either pusher or puller, is represented by a distribution of point forces corresponding to the body and the flagellum. We study in particular the minimal model consisting of only three beads (two for the body and one for the flagellum) connected by rigid, inextensible links. When the beads are collinear, standard straight swimming is realized and, in the absence of propulsion, we demonstrate that the model recovers Jeffery’s equation for a thin rod. Conversely, by imposing an angle between body and flagellum the swimmer moves on circular orbits. We discuss how two swimmers, in collinear or non-collinear geometry, scatter upon encounter. Finally, we explore the dynamics of a large number of swimmers reacting to one another only via hydrodynamic interactions, and exemplify their complex collective dynamics in both straight and circular swimmers.
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| doi_str_mv | 10.1140/epje/s10189-024-00458-z |
| format | Article |
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| subjects | Biological and Medical Physics Biophysics Circular orbits Complex Fluids and Microfluidics Complex Systems Nanotechnology Numerical models Physics Physics and Astronomy Polymer Sciences Regular Article - Living Systems Soft and Granular Matter Surfaces and Interfaces Swimming Thin Films |
| title | Modeling straight and circle swimmers: from single swimmer to collective motion |
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