C6 (E): Linking hydrodynamics and microscopic models of wet active matter with anisotropic particles
The goal of this project is to develop a systematic, quantitative coarse-graining approach for a class of inherently non-equilibrium systems, namely suspensions of self-propelled particles. We link particle based models with effective hydrodynamic models within a multiscale framework based on sequential coupling and parameter passing. To this end, we combine microscopic Stokesian dynamics simulations with a mesoscopic kinetic model coupled to the macroscopic Stokes equation, and, in a second step, derive an effective hydrodynamic description in terms of particle density, polarization and nematic order parameter profiles. The multiscale scheme is applied to systems of self-propelled rod-like magnetic colloids suspended in a fluid. This is motivated by recent experiments on magnetotactic bacteria, which have shown that the interplay of internal drive (self-propulsion, mutual interactions) and external drive (magnetic field, oxygen gradient) in these systems leads to emergent collective dynamics - propagating magnetotactic bands on length-scales L much larger than the particles size a, L/a > 100.
This project has ended in June 2018.
Flow properties and hydrodynamic interactions of rigid spherical microswimmers
Physical Review E 96 (5), (2017);
- Dr. Sara Jabbari Farouji
- Institut für Physik
- Universität Mainz
- Staudingerweg 9
- D-55128 Mainz
- Tel: +49 6131-39-20494
- Fax: +49 6131-39-20496
- Sekr: +49 6131 3920495