University of Cambridge > Talks.cam > DAMTP BioLunch > Diffusion of active particles in a complex environment strongly depends on boundary conditions

  Browse A-Z

Log in

Googledetails Microsoftdetails

🔐 Log In

Information on

Subscribing to talksdetails Finding a talkdetails Adding a talkdetails Disseminating talksdetails Help and Documentationdetails

ℹī¸ Information

Diffusion of active particles in a complex environment strongly depends on boundary conditions

Download to your calendar using vCal

If you have a question about this talk, please contact Anne Herrmann .

Upon collision with a circular obstacle, pusher-like active particles (e.g. bacteria, Janus particles) temporarily glide along the surface of the obstacle. They then leave the obstacle approximately at a tangent to the surface. Microfluidic experiments have shown that bacteria appear to be guided by regular structures of such obstacles. Here we introduce a theoretical framework based on simulations of active (Brownian) particles in a hexagonal lattice. We show that the observed guiding effect could be a consequence of mere geometric constraints as opposed to more complicated long-range hydrodynamic interactions, and that for certain parameter ranges, large diffusion coefficients approaching the free space case are possible even at high obstacle density. We contrast this with the Lorentz gas, where particles undergo billiard ball-like collisions.

This talk is part of the DAMTP BioLunch series.

This talk is included in these lists:

Note that ex-directory lists are not shown.

Other lists

Webinar & FW11, Computer Laboratory, William Gates Building. Cambridge University Engineering Department, LR2 CPB Maria

Other talks

Title to be confirmed The uplift and erosion history of the Gamburtsev Subglacial Mountains and their role in the formation of the East Antarctic Ice Sheet A Novel Diffusion Model based Approach for Sleep Music Generation Title to be confirmed Morning Tea and Coffee Washing machines and their rare components: lessons from kidney patients
 

Š 2006-2025 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity