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Modeling of Chlamydomonas reinhardtii motility in confinement


Cammann,  Jan
Group Non-equilibrium soft matter, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Cammann, J. (2016). Modeling of Chlamydomonas reinhardtii motility in confinement. Bachelor Thesis, Georg-August-Universität, Göttingen.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-3BC3-6
Microswimmers, such as bacteria or motile algae, which typically live in water and
soil encounter boundaries very frequently. A wide range of dierent microswimmers
seem to spend a signicant amount of time close to such boundaries as opposed
to staying in the bulk. Dierent physical mechanisms have been proposed to explain
these observations, such as hydrodynamic interactions or steric forces. While
hydrodynamics are able to give a good explanation for pusher-type swimmers, its
predictions for puller-type swimmers do not explain the trapping at walls. Here the
\wall-hugging" eect of puller-type swimmers will be explained. A simple dumbbell
model for the cell's shape will be introduced to model the steric wall interactions of
Chlamydomonas reinhardtii in a quasi 2d environment. Simulations of this model
will be performed and compared with experimental results.