Comptes Rendus
no. 4
Unstable modes of laminar round fountains on inclined wall
[Modes instables de fontaines circulaires laminaires sur parois inclinées]
Aymeric Lamorlette1  ; Rabah Mehaddi1  ; Olivier Vauquelin1
1 IUSTI (UMR CNRS 6595), Aix-Marseille université, technopôle de Château-Gombert, 60, rue Joliot Curie, 13453 Marseille cedex 13, France
Comptes Rendus. Mécanique, Volume 339 (2011) no. 4, pp. 250-256.

Des expériences ont été menées sur des fontaines inversées faibles laminaires inclinées qui permettent dʼassurer que les modes instables des fontaines circulaires sont perturbés par lʼinclinaison. En effet, en comparant aux fontaines se développant sur paroi horizontale, certains modes disparaissent alors que dʼautres se séparent en plusieurs modes. Ce papier a pour but de décrire et cerner ces nouveaux modes en fonction de lʼinclinaison et de la vitesse dʼinjection. Des explications concernant lʼorigine de lʼévolution des instabilités sont également proposées.

Experiments were carried out on reversed weak laminar inclined fountains to asses that unstable modes of round fountains are disturbed by the inclination. Indeed, compared to fountains developing on horizontal wall, some modes disappeared while others are split in several modes. This paper aims at describing and mapping these new modes regarding to the inclination and the inlet velocity. Explanations about what made the unstable modes evolve are also proposed.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crme.2011.01.004
Keywords: Fluid mechanics, Laminar fountain, Unstable modes, Inclined wall
Mot clés : Mécanique des fluides, Fontaine laminaire, Modes instables, Paroi inclinée
Aymeric Lamorlette 1 ; Rabah Mehaddi 1 ; Olivier Vauquelin 1

1 IUSTI (UMR CNRS 6595), Aix-Marseille université, technopôle de Château-Gombert, 60, rue Joliot Curie, 13453 Marseille cedex 13, France 
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     title = {Unstable modes of laminar round fountains on inclined wall},
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Aymeric Lamorlette; Rabah Mehaddi; Olivier Vauquelin. Unstable modes of laminar round fountains on inclined wall. Comptes Rendus. Mécanique, Volume 339 (2011) no. 4, pp. 250-256. doi : 10.1016/j.crme.2011.01.004. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2011.01.004/

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