Thermally driven Marangoni surfers
| hal.structure.identifier | Laboratoire Ondes et Matière d'Aquitaine [LOMA] | |
| dc.contributor.author | WÜRGER, Alois | |
| dc.date.issued | 2014-07-10 | |
| dc.identifier.issn | 0022-1120 | |
| dc.description.abstractEn | We study autopropulsion of an interface particle that is driven by the Marangoni stress arising from a self-generated asymmetric temperature or concentration field. We calculate separately the long-range Marangoni flow vI due to the stress discontinuity at the interface and the short-range velocity field vP imposed by the no-slip condition on the particle surface. Both contributions are evaluated for a spherical floater with temperature monopole and dipole moments. We find that the self-propulsion velocity is given by the amplitude of the 'source doublet' that belongs to the short-range contribution vP. Hydrodynamic interactions, on the other hand, are determined by the long-range Marangoni flow vI . Its dipolar part results in an asymmetric advection pattern of neighbouring particles, which in turn may perturb the known hexatic lattice or even favour disordered states. | |
| dc.language.iso | en | |
| dc.publisher | Cambridge University Press (CUP) | |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc/ | |
| dc.subject.en | Active soft matter | |
| dc.subject.en | Janus particles | |
| dc.subject.en | autopropulsion | |
| dc.subject.en | Marangoni effect | |
| dc.subject.en | thermocapillary | |
| dc.title.en | Thermally driven Marangoni surfers | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1017/jfm.2014.349 | |
| dc.subject.hal | Physique [physics]/Matière Condensée [cond-mat]/Matière Molle [cond-mat.soft] | |
| bordeaux.journal | Journal of Fluid Mechanics | |
| bordeaux.page | 589 | |
| bordeaux.volume | 752 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01021962 | |
| hal.version | 1 | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01021962v1 | |
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