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Sujet de stage / Master 2 Internship

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Active matter: kinetic and hydrodynamic descriptions of dense suspensions of microswimmers

Contact: CHATE Hugues, , hugues.chate@cea.fr, +33 1 69 08 73 46
Summary:
We have recently developed simple and numerically efficient particle-based models of suspensions of microswimmers that are amenable to theoretical treatments leading to continuous descriptions, either at the kinetic or at the hydrodynamic level. The internship, with a possible extension as a PhD, will explore the first steps on this promising route. The project also includes direct collaborations with experimentalists working on dense bacterial colonies, in Hong Kong and Shanghai.
Possibility of continuation in PhD: Oui
Deadline for application:03/04/2018

Full description:
The past ten years have seen the emergence of Active Matter – composed of particles that convert energy from an ambient source into systematic movement -- as a distinct topic in nonequilibrium statistical physics, motivated mainly by the need to understand and imitate individual and collective motility.
It is fair to say that a satisfactory understanding has been reached for the case of ‘dry’ active matter, i.e. for situations where the fluid surrounding particles can be neglected (e.g. when they crawl on a substrate). For suspensions of swimmers (wet active matter), much remains to be done, in particular in connecting individual-based models to continuous theories. Particularly challenging is the case of dense suspensions.
We have recently developed simple and numerically efficient particle-based models that are amenable to kinetic theory treatments leading to continuous descriptions, either at the kinetic or at the hydrodynamic level. The internship, with a possible extension as a PhD, will explore the first steps on this promising route.
The project will also include direct collaborations with experimentalists working on dense bacterial colonies, in Hong Kong and Shanghai.
Reference:
Chen, Chong and Liu, Song and Shi, Xia-qing and Chaté, Hugues and Wu, Yilin, Weak synchronization and large-scale collective oscillation in dense bacterial suspensions, Nature 542, 210 (2017).
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