Swinging Motion of Active Deformable Particles in Poiseuille Flow
arXiv:1707.05220 · doi:10.1103/PhysRevE.96.022602
Abstract
Dynamics of active deformable particles in an external Poiseuille flow is investigated. In order to make the analysis general, we employ time-evolution equations derived from symmetry considerations that take into account an elliptical shape deformation. First, we clarify the relation of our model to that of rigid active particles. Then, we study the dynamical modes that active deformable particles exhibit by changing the strength of the external flow. We emphasize the difference between the active particles that tend to self-propel parallel to the elliptical shape deformation and those self-propelling perpendicularly. In particular, a swinging motion around the centerline far from the channel walls is discussed in detail.
13 pages, 7 figures; to be published in Phys. Rev. E: https://journals.aps.org/pre/accepted/e607aRc9R3912e1667878e943ec612022c4c0e077
References in corpus (15)
- The hydrodynamics of swimming microorganisms
- Hydrodynamic attraction of swimming microorganisms by surfaces
- Propulsion of a molecular machine by asymmetric distribution of reaction--products
- Diffusive transport without detailed balance in motile bacteria: Does microbiology need statistical physics?
- Turning bacteria suspensions into a "superfluid"
- Self Running Droplet: Emergence of Regular Motion from Nonequilibrium Noise
- Self-propulsion of pure water droplets by spontaneous Marangoni stress driven motion
- Sedimentation, trapping, and rectification of dilute bacteria
- Phototaxis of synthetic microswimmers in optical landscapes
- Persistent Cell Motion in the Absence of External Signals: A Search Strategy for Eukaryotic Cells
- Mode Selection in the Spontaneous Motion of an Alcohol Droplet
- Dynamics of swimming bacteria at complex interfaces
- Periodic and Quasiperiodic Motion of an Elongated Microswimmer in Poiseuille Flow
- Dumb-bell swimmers
- A simple self-organized swimmer driven by molecular motors