Closely spaced co-rotating helical vortices: long-wave instability

Autor: A. Castillo-Castellanos, S. Le Dizès

Publikováno v: Journal of Fluid Mechanics
Journal of Fluid Mechanics, 2022, 946, ⟨10.1017/jfm.2022.569⟩

We consider as base flow the stationary vortex filament solution obtained by Castillo-Castellanos et al. (Phys. Rev. Fluids, vol. 6, 2021, 114701) in the far wake of a rotor with tip-splitting blades. The cases of a single blade and of two blades wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5e9d1d4d62dde392df3ffe3402c971c
https://hal-amu.archives-ouvertes.fr/hal-03746533

Experimental measurements of the bacterial oxidation of HT in soils: Impact over a zone influenced by an industrial release of tritium in HT form

Autor: D. Maro, S. Le Dizès, D. Hébert, H. Renard, O. Connan, Luc Solier, P. Laguionie, O. Cazimajou

Publikováno v: Journal of environmental radioactivity. 242

Tritium is a radionuclide released to the atmosphere by nuclear industries in various forms, mainly HTO and to a lesser extent HT. However, some nuclear sites may emit predominantly HT in the atmosphere. The HT is oxidized to HTO essentially in the t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df9b4ebbe27836d738053c49fafd71e7
https://pubmed.ncbi.nlm.nih.gov/34847526

Structure and stability of Joukowski's rotor wake model

Autor: S. Le Dizès, E. Durán Venegas, P. Rieu

Publikováno v: Journal of Fluid Mechanics
Journal of Fluid Mechanics, 2021, 911, pp.A6. ⟨10.1017/jfm.2020.985⟩
Journal of Fluid Mechanics, Cambridge University Press (CUP), 2021, 911, pp.A6. ⟨10.1017/jfm.2020.985⟩

In this work, Joukowski's rotor wake model is considered for a two-blade rotor of radius . Solutions are provided for a two-bladed rotor for both helicopters and wind turbines. Particular attention is brought to the study of the solutions describing

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a809bece7253ee345a82e0a27a24847e
https://hal.science/hal-02978108

Instability of vertically stratified horizontal plane Poiseuille flow

Autor: J Chen, Uwe Harlander, I. D. Borcia, S. Le Dizès, Benjamin Favier, P. Le Gal

Publikováno v: Journal of Fluid Mechanics. 907

We present here the first study on the stability of plane Poiseuille flow when the fluid is stratified in density perpendicularly to the plane of horizontal shear. Using laboratory experiments, linear stability analyses and direct numerical simulatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8701bfe7a47b9e20eaeaac761ab2b586
https://doi.org/10.1017/jfm.2020.917

Joukowski’s wake model for tip-splitting rotors

Autor: S. Le Dizès, E. Durán Venegas, A. Castillo-Castellanos

Publikováno v: Journal of Physics: Conference Series
Journal of Physics: Conference Series, IOP Publishing, 2021, 1934 (1), pp.012005. ⟨10.1088/1742-6596/1934/1/012005⟩
Journal of Physics: Conference Series, 2021, 1934 (1), pp.012005. ⟨10.1088/1742-6596/1934/1/012005⟩

The interaction between a tip vortex and a solid surface is responsible for premature structural component fatigue in wind turbines and undesirable noise in helicopter rotors during low speed and descending flight. One noise reduction strategy uses a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4da0bc77a6cd6fe7f0cc9bbfde79ffb0
https://doi.org/10.1088/1742-6596/1934/1/012005