Phase Defects

brumley_etal_fig2

Does a stronger interaction always make for a more stable system? Certainly not for synchronising oscillators, as we show in a paper just accepted in Physical Review Fluids. There we study the behaviour of a strip of colloidal rotors as the system is lifted from a no-slip surface. As the hydrodynamic coupling strengthens, the system develop recurring phase defects which worsen its synchronisation. Our simulations show that defects result from a competition between short-range and long-range coupling. The paper is currently accessible through the ArXiv.

Update: The paper has been published (open access) and is now available here.

Colloidal Entrainment

figure2Particle entrainment by Raphaël, just accepted on Nat Com!

What happens to passive microparticles within a suspension of microorganisms? If the particles are small, they can be entrained over large distances by the micro swimmers. These interactions are rare, but their magnitude is large and -as it turns out- they end up dominating particle dynamics, which now resembles a jump-diffusion process. This is presented and discussed in details in a new work led by Raphaël, just accepted on Nature Communications. A preprint of the article (well.. a previous version) is currently available on the Arxiv.

Update. The article is now available here.

Visiting IMEDEA

Good news today! My application for a Visiting Fellowship to the Mediterranean Institute od Advanced Studies (IMEDEA) has been approved by the University of the Balearic Islands! I will be working with my good friend Idan Tuval from mid July to the beginning of September. We’ll work on experiments and modelling related to a parasite of dinoflagellates. Really looking forward to it!