Transition from deep to shallow water layer: formation of vortex dipoles
| hal.structure.identifier | Transferts, écoulements, fluides, énergétique [TREFLE] | |
| dc.contributor.author | SOUS, Damien | |
| hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
| dc.contributor.author | BONNETON, Natalie | |
| hal.structure.identifier | Laboratoire des Écoulements Géophysiques et Industriels [Grenoble] [LEGI] | |
| dc.contributor.author | SOMMERIA, Joël | |
| dc.date.issued | 2005 | |
| dc.identifier.issn | 0997-7546 | |
| dc.description.abstractEn | In this paper we study the transition from a deep to a shallow water layer and the formation of quasi-two-dimensional vortex dynamics. Vortices are experimentally generated by a circular horizontal turbulent pulsed jet. The dimensional analysis gives two relevant dimensionless parameters: the jet Reynolds number $Re$ and a number $C$ which characterizes the vertical confinement. They are respectively defined by $Re=Q/\nu$ and $C=(Q/H^2)t_\text{inj}$ ($H$ is the water depth, $\nu$ is the kinematical viscosity, $Q$ the injected momentum flux and $t_\text{inj}$ the injection duration). Experimental results show a strong influence of $C$ on the flow: when $C<1$, the evolution is a typical three-dimensional turbulence decay, while when $C>2$ we observe the formation of large vortex dipoles. However these dipoles are not strictly two-dimensional because of the presence of a vertical circulation in the front of the dipole. Results are independent of the jet Reynolds number in the range $1000< Re< 1800$. In addition, a comparison between experimental shallow water dipoles and theoretical model is exposed. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.rights.uri | http://creativecommons.org/licenses/by/ | |
| dc.subject.en | Shallow water | |
| dc.subject.en | Experiment | |
| dc.subject.en | Vortex dipole | |
| dc.subject.en | Quasi-two-dimensional turbulence | |
| dc.title.en | Transition from deep to shallow water layer: formation of vortex dipoles | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.euromechflu.2004.06.002 | |
| dc.subject.hal | Physique [physics]/Mécanique [physics]/Mécanique des fluides [physics.class-ph] | |
| dc.subject.hal | Sciences de l'ingénieur [physics]/Mécanique [physics.med-ph]/Mécanique des fluides [physics.class-ph] | |
| bordeaux.journal | European Journal of Mechanics - B/Fluids | |
| bordeaux.page | 19-32 | |
| bordeaux.volume | 24 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00260775 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00260775v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=European%20Journal%20of%20Mechanics%20-%20B/Fluids&rft.date=2005&rft.volume=24&rft.spage=19-32&rft.epage=19-32&rft.eissn=0997-7546&rft.issn=0997-7546&rft.au=SOUS,%20Damien&BONNETON,%20Natalie&SOMMERIA,%20Jo%C3%ABl&rft.genre=article |
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