Project C6 (Completed): 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.
Publications
Compression-induced anti-nematic order in glassy and semicrystalline polymers
Sara Jabbari-Farouji, Damien Vandembroucq
Soft Matter 16 (1), 102-106 (2020)
Link: https://doi.org/10.1039/c9sm01848d
Emergent pattern formation of active magnetic suspensions in an external field
Fabian R Koessel, Sara Jabbari-Farouji
New Journal of Physics 22 (10), 103007 (2020)
Link: https://doi.org/10.1088/1367-2630/abb64d
Supramolecular copolymers predominated by alternating order: Theory and application
Reinier van Buel, Daniel Spitzer, Christian Marijan Berac, Paul van der Schoot, Pol Besenius, Sara Jabbari-Farouji
The Journal of Chemical Physics 151 (1), 014902 (2019)
Link: https://doi.org/10.1063/1.5097577
Controlling stability and transport of magnetic microswimmers by an external field
Fabian R. Koessel, Sara Jabbari-Farouji
EPL (Europhysics Letters)125 (2), 28001 (2019)
Link: https://doi.org/10.1209/0295-5075/125/28001
Ewald sum for hydrodynamic interactions of rigid spherical microswimmers
Tapan Chandra Adhyapak, Sara Jabbari-Farouji
The Journal of Chemical Physics 149 (14), 144110 (2018)
Link: https://doi.org/10.1063/1.5045274
Static and dynamic scaling behavior of a polymer melt model with triple-well bending potentia
Sara Jabbari-Farouji
Journal of Polymer Science B 56, 1376-1392 (2018)
Link: https://doi.org/10.1002/polb.24721
Flow properties and hydrodynamic interactions of rigid spherical microswimmers
Tapan Chandra Adhyapak, Sara Jabbari-Farouji
Physical Review E96 (5), (2017)
Link: https://doi.org/10.1103/PhysRevE.96.052608
Role of the Intercrystalline Tie Chains Network in the Mechanical Response of Semicrystalline Polymers
Sara Jabbari-Farouji, Olivier Lamé, Michel Perez, Jörg Rottler, Jean-Louis Barrat
Physical Review Letters 118, 217802 (2017)
Link: https://doi.org/10.1103/PhysRevLett.118.217802