Light-controlled flows in active fluids
Sign Up to like & getrecommendations! Published in 2017 at "Nature Physics"
DOI: 10.1038/nphys3926
Abstract: The ability of phototactic microorganisms to move towards optimal light intensities is exploited to generate fluid flows on scales several orders larger than the swimmers themselves. These flows are shown to function as hydrodynamic tweezers. read more here.
Keywords: controlled flows; flows active; light controlled; active fluids ... See more keywords
Sounds and hydrodynamics of polar active fluids
Sign Up to like & getrecommendations! Published in 2018 at "Nature Materials"
DOI: 10.1038/s41563-018-0123-4
Abstract: Spontaneously flowing liquids have been successfully engineered from a variety of biological and synthetic self-propelled units1–11. Together with their orientational order, wave propagation in such active fluids has remained a subject of intense theoretical studies12–17.… read more here.
Keywords: hydrodynamics polar; propagation; sounds hydrodynamics; active fluids ... See more keywords
Passive objects in confined active fluids: A localization transition.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.106.044604
Abstract: We study how walls confining active fluids interact with asymmetric passive objects placed in their bulk. We show that the objects experience nonconservative long-ranged forces mediated by the active bath. To leading order, these forces… read more here.
Keywords: objects confined; confined active; passive objects; active fluids ... See more keywords
Phase separation in ordered polar active fluids: A completely different universality class from that of equilibrium fluids.
Sign Up to like & getrecommendations! Published in 2024 at "Physical review. E"
DOI: 10.1103/physreve.110.054607
Abstract: It has recently been shown that large collections of self-propelled entities (a.k.a. "flocks" or, more technically, polar-ordered active fluids), all spontaneously moving in the same direction, can undergo phase separation in the presence of sufficiently… read more here.
Keywords: separation; phase separation; equilibrium; separation ordered ... See more keywords
Generalized Archimedes' principle in active fluids.
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review E"
DOI: 10.1103/physreve.96.032606
Abstract: We show how a gradient in the motility properties of noninteracting pointlike active particles can cause a pressure gradient that pushes a large inert object. We calculate the force on an object inside a system… read more here.
Keywords: active fluids; principle active; generalized archimedes; archimedes principle ... See more keywords
Force Generation in Confined Active Fluids: The Role of Microstructure.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.058001
Abstract: We experimentally determine the force exerted by a bath of active particles onto a passive probe as a function of its distance to a wall and compare it to the measured averaged density distribution of… read more here.
Keywords: active particles; confined active; force generation; active fluids ... See more keywords