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.
Compression-induced anti-nematic order in glassy and semicrystalline polymers
Soft Matter 16 (1),
102-106
(2020);
doi:10.1039/c9sm01848d
Emergent pattern formation of active magnetic suspensions in an external field
New Journal of Physics 22 (10),
103007
(2020);
doi:10.1088/1367-2630/abb64d
Supramolecular copolymers predominated by alternating order: Theory and application
The Journal of Chemical Physics 151 (1),
014902
(2019);
doi:10.1063/1.5097577
Controlling stability and transport of magnetic microswimmers by an external field
EPL (Europhysics Letters) 125 (2),
28001
(2019);
doi:10.1209/0295-5075/125/28001
Ewald sum for hydrodynamic interactions of rigid spherical microswimmers
The Journal of Chemical Physics 149 (14),
144110
(2018);
doi:10.1063/1.5045274
Flow properties and hydrodynamic interactions of rigid spherical microswimmers
Physical Review E 96 (5),
(2017);
doi:10.1103/physreve.96.052608
Contact
- 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
- sjabbarirIExY.gM@rSdyWh-uni-mainz.de
- https://www.komet1.physik.uni-mainz.de/people/sara-jabbari-farouji