dc.date.accessioned | 2024-03-18T18:16:08Z | |
dc.date.available | 2024-03-18T18:16:08Z | |
dc.date.created | 2023-06-14T13:01:15Z | |
dc.date.issued | 2023 | |
dc.identifier.citation | Rønning, Jonas Marchetti, M. Cristina Angheluta, Luiza . Defect self-propulsion in active nematic films with spatially varying activity. Royal Society Open Science. 2023, 10(2) | |
dc.identifier.uri | http://hdl.handle.net/10852/109790 | |
dc.description.abstract | We study the dynamics of topological defects in active nematic films with spatially varying activity and consider two set-ups: (i) a constant activity gradient and (ii) a sharp jump in activity. A constant gradient of extensile (contractile) activity endows the comet-like +1/2 defect with a finite vorticity that drives the defect to align its nose in the direction of decreasing (increasing) gradient. A constant gradient does not, however, affect the known self-propulsion of the +1/2 defect and has no effect on the −1/2 that remains a non-motile particle. A sharp jump in activity acts like a wall that traps the defects, affecting the translational and rotational motion of both charges. The +1/2 defect slows down as it approaches the interface and the net vorticity tends to reorient the defect polarization so that it becomes perpendicular to the interface. The −1/2 defect acquires a self-propulsion towards the activity interface, while the vorticity-induced active torque tends to align the defect to a preferred orientation. This effective attraction of the negative defects to the wall is consistent with the observation of an accumulation of negative topological charge at both active/passive interfaces and physical boundaries. | |
dc.language | EN | |
dc.publisher | The Royal Society Publishing | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Defect self-propulsion in active nematic films with spatially varying activity | |
dc.title.alternative | ENEngelskEnglishDefect self-propulsion in active nematic films with spatially varying activity | |
dc.type | Journal article | |
dc.creator.author | Rønning, Jonas | |
dc.creator.author | Marchetti, M. Cristina | |
dc.creator.author | Angheluta, Luiza | |
cristin.unitcode | 185,15,4,0 | |
cristin.unitname | Fysisk institutt | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 2154453 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Royal Society Open Science&rft.volume=10&rft.spage=&rft.date=2023 | |
dc.identifier.jtitle | Royal Society Open Science | |
dc.identifier.volume | 10 | |
dc.identifier.issue | 2 | |
dc.identifier.pagecount | 0 | |
dc.identifier.doi | https://doi.org/10.1098/rsos.221229 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 2054-5703 | |
dc.type.version | PublishedVersion | |
cristin.articleid | 221229 | |