Des bruits et des ondes : mathématiciens et physiciens en interaction

Autor: Colin de Verdière, Yves

Publikováno v: Comptes Rendus. Physique, Vol 21, Iss 2, Pp 199-202 (2020)

We describe the collaboration of the author, a mathematician, with two groups of physicists: seismologists and physicists of waves in fluids.

Externí odkaz: https://doaj.org/article/479d0d99687549bba191c297de675f78

Etude expérimentale d'anneaux tourbillonnaires impactant une stratification : dynamique tourbillonnaire et génération d'ondes internes

Autor: Pinaud, Johan

Publikováno v: Mécanique des fluides [physics.class-ph]. Université Paul Sabatier-Toulouse III, 2020. Français. ⟨NNT : 2020TOU30271⟩

In this work, the interaction between model vortex structures observed in many flows, vortex rings, and a linearly stratified fluid is studied. A light homogeneous vortex ring is generated and penetrates by inertia into a density stratification. The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::285e994ce0a7b2debce7e8ddeb256d2e
https://tel.archives-ouvertes.fr/tel-03244590/document

Traitements correctifs des effets de décohérence acoustique induits par les fluctuations du milieu de propagation : algorithmes d’estimation bayésienne des directions d’arrivée en milieu fluctuant

Autor: Beaumont, Guillaume

Publikováno v: Traitement du signal et de l'image [eess.SP]. Ecole nationale supérieure Mines-Télécom Atlantique, 2020. Français. ⟨NNT : 2020IMTA0200⟩

The purpose of these works is to propose new "physically informed" bayesian algorithms for DOA estimationin presence of random fluctuations due to the presence of internal waves in the propagation medium. First we will seehow to describe these fluctu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2592::6d08568a887003745377deacedbfc4a1
https://tel.archives-ouvertes.fr/tel-02928359

Energy and Buoyancy Transport by Inertia-Gravity Waves in Non-Linear Stratifications. Application to the Ocean

Autor: Boury, Samuel

Publikováno v: Mechanics of the fluids [physics.class-ph]. Université de Lyon, 2020. English. ⟨NNT : 2020LYSEN014⟩

Inertia-gravity waves contribute to the worldwide transport of energy and momentum in the oceans, and theyplay a crucial role in stratified mixing through non-linear processes transferring energy from scales to scalessuch as super-harmonic generation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______212::f773ab44150ad4cfa2b1ee33b3e73c54
https://tel.archives-ouvertes.fr/tel-02921569/file/BOURY_Samuel_2020LYSEN014_These.pdf

Numerical study of 2D stratified turbulence forced by internal gravity waves

Autor: Calpe Linares, Miguel

Publikováno v: Fluid mechanics [physics.class-ph]. Université Grenoble Alpes [2020-..], 2020. English. ⟨NNT : 2020GRALI008⟩
Mechanics of the fluids [physics.class-ph]. Université Grenoble Alpes, 2020. English. ⟨NNT : 2020GREAI008⟩

The oceanic motions are composed of eddies with a very large horizontal scaleand 3D propagating internal gravity waves. Its kinetic energy spectra follow thewell-known Garrett and Munk spectrum, which is usually interpreted as thesignature of interac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::081a8b5547bb584878edc85d47715998
https://tel.archives-ouvertes.fr/tel-02612797v2/document