Hauptseminar Active Matter SS 2017/Clustering of Microswimmers in a Langevin Dynamics Model
- Clustering of Microswimmers in a Langevin Dynamics Model
- Timur Koyuk
- Michael Kuron
By a process called motility-induced phase separation (MIPS), self-propelled particles can spontaneously transition from a dilute suspension to form dense clusters. The properties of these clusters are determined by the particle-particle interactions. Depending on the strength of the active propulsion, phase separation can either be enhanced or inhibited.
To observe these effects in simulation, simple models based on Langevin Dynamics, i.e. without hydrodynamics, are sufficient. This shows that MIPS is a very universal effect. At the same time, it also permits the application of highly efficient Molecular Dynamics (MD) simulations to study systems with millions of particles.