Výsledky vyhledávání - "Julien Salort"

Turbulent transition in Rayleigh-Bénard convection with Fluorocarbon

Autor: Lucas Méthivier, Romane Braun, Francesca Chillà, Julien Salort

Publikováno v: EPL-Europhysics Letters
EPL-Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2022, 136, pp.10003. ⟨10.1209/0295-5075/ac34d4⟩
EPL-Europhysics Letters, 2022, 136, pp.10003. ⟨10.1209/0295-5075/ac34d4⟩

We present measurements of the global heat transfer and the velocity field in two Rayleigh-Bénard cells (aspect ratios 1 and 2). We use Fluorinert FC770 as the working fluid, up to a Rayleigh number . The velocity field is inferred from sequences of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d860fd54e664d3eda724d84d73dd0987
https://hal.archives-ouvertes.fr/hal-03261081

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Lagrangian Measurements in Turbulent Thermal Convection: About the Inhomogeneity of the Velocity and Temperature Fields

Autor: Yoann Gasteuil, Fanny Seychelles, Francesca Chillà, Julien Salort, Olivier Liot, Jean-François Pinton

Publikováno v: Procedia IUTAM. 20:112-119

Turbulent thermal convection is a complex problem: the flow is forced at almost all scales, because of the presence of both large scale circulation and small scale plumes. Moreover the difference of density induced by temperature adds an ingredient i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec49a15ad70ffff8356926a8ccd96207

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Pair dispersion in inhomogeneous turbulent thermal convection

Autor: Olivier Liot, David Martin-Calle, Amélie Gay, Julien Salort, Francesca Chillà, Mickaël Bourgoin

Publikováno v: Physical Review Fluids
Physical Review Fluids, 2019, 4, pp.094603. ⟨10.1103/PhysRevFluids.4.094603⟩
Physical Review Fluids, American Physical Society, 2019, 4, pp.094603. ⟨10.1103/PhysRevFluids.4.094603⟩

Due to large scale flow inhomogeneities and the effects of temperature, turbulence small-scale structure in thermal convection is still an active field of investigation, especially considering sophisticated Lagrangian statistics. Here we experimental

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0adc184a330c356f381bebb371581506
https://hal.science/hal-01966847/file/Liot2019_PRF_arXiv.pdf

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Simultaneous temperature and velocity Lagrangian measurements in turbulent thermal convection

Autor: Sergio Chibbaro, Fanny Seychelles, Julien Salort, Francesco Zonta, Jean-François Pinton, Olivier Liot, Yoann Gasteuil, Thibaut Coudarchet, Francesca Chillà

Publikováno v: Journal of Fluid Mechanics
Journal of Fluid Mechanics, Cambridge University Press (CUP), 2016, 794, pp.655-675. ⟨10.1017/jfm.2016.190⟩
Journal of Fluid Mechanics, 2016, 794, pp.655-675. ⟨10.1017/jfm.2016.190⟩

We report joint Lagrangian velocity and temperature measurements in turbulent thermal convection. Measurements are performed using an improved version (extended autonomy) of the neutrally-buoyant instrumented particle that was used by to performed ex

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25e52ab8df8809483819e663b0b9c629
https://doi.org/10.1017/jfm.2016.190

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Structure, dynamics and reconnection of vortices in a nonlocal model of superfluids

Autor: Laurent Chevillard, Julien Salort, Jason Reneuve

We study the reconnection of vortices in a quantum fluid with a roton minimum, by numerically solving the Gross-Pitaevskii (GP) equations. A non-local interaction potential is introduced to mimic the experimental dispersion relation of superfluid $^4

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67e8b0465bb32e44d70759b93c20e377
http://arxiv.org/abs/1807.05791

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A local sensor for joint temperature and velocity measurements in turbulent flows

Autor: Francesca Chillà, Bernard Castaing, Philippe-Emmanuel Roche, Ronald du Puits, Julien Salort, O. Pirotte, Alice Loesch, Laurent Robert, Eleonore Rusaouen

Publikováno v: Review of Scientific Instruments
Review of Scientific Instruments, American Institute of Physics, 2018, 89 (1), pp.015005. ⟨10.1063/1.4989430⟩
Review of Scientific Instruments, 2018, 89 (1), pp.015005. ⟨10.1063/1.4989430⟩

International audience; We present the principle for a micro-sensor aimed at measuring local correlations of turbulent velocity and temperature. The operating principle is versatile and can be adapted for various types of flow. It is based on a micro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::628fd65ec26e219b15cd782f50308dc4
https://hal.archives-ouvertes.fr/hal-01667711/file/RSI_Cantilever_HAL.pdf

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Thermal transfer in Rayleigh-Bénard cell with smooth or rough boundaries

Autor: Bernard Castaing, Olivier Liot, Francesca Chillà, Eleonore Rusaouen, Julien Salort

Publikováno v: Journal of Fluid Mechanics
Journal of Fluid Mechanics, Cambridge University Press (CUP), 2017, 837, pp.443-460. ⟨10.1017/jfm.2017.852⟩
Journal of Fluid Mechanics, 2017, 837, pp.443-460. ⟨10.1017/jfm.2017.852⟩

Several Rayleigh–Bénard experiments in water are performed with smooth or rough boundaries. We present new thermal transfer measurements obtained with large roughness elements arranged in a square lattice. The data are compared to previous data ob

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbda11dc61f04111cd74dde01dc26fb2
https://hal.archives-ouvertes.fr/hal-01508393v2/file/JFMBertha_HAL_v2.pdf

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Turbulent heat transport regimes in a channel

Autor: Bernard Castaing, Julien Salort, Eleonore Rusaouen, Francesca Chillà

Publikováno v: Physical Review Fluids
Physical Review Fluids, American Physical Society, 2017, ⟨10.1103/PhysRevFluids.2.062801⟩
Physical Review Fluids, 2017, ⟨10.1103/PhysRevFluids.2.062801⟩

International audience; In this paper we focus on the turbulent transport of a scalar through a channel. The scalar flux, and the corresponding scalar concentration gradient along the channel allow to define a Nusselt number and a Grashof number. Whi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b09649e86c812142b4eb99d9f65bb1e
https://hal.archives-ouvertes.fr/hal-01502869

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Velocity fluctuations and boundary layer structure in a rough Rayleigh-Bénard cell filled with water

Autor: Eleonore Rusaouen, Olivier Liot, Thibaut Coudarchet, Quentin Ehlinger, Julien Salort, Francesca Chillà

Publikováno v: Physical Review Fluids
Physical Review Fluids, 2017, 2 (4), ⟨10.1103/PhysRevFluids.2.044605⟩
Physical Review Fluids, American Physical Society, 2017, 2 (4), ⟨10.1103/PhysRevFluids.2.044605⟩

International audience; We report Particle Image Velocimetry of the Large Scale Circulation and the viscous boundary layer in turbulent thermal convection. We use two parallelepipedic Rayleigh-Bénard cells with a top smooth plate. The first one has

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6e91d6d83f0a593574c37ef0467da27
https://hal.science/hal-01391492v2/document

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Intermittency of quantum turbulence with superfluid fractions from 0% to 96%

Autor: Benoît Chabaud, Julien Salort, Eleonore Rusaouen, Philippe-E. Roche

Publikováno v: Physics of Fluids
Physics of Fluids, American Institute of Physics, 2017, 29 (10), pp.105108. ⟨10.1063/1.4991558⟩
Physics of Fluids, 2017, 29 (10), pp.105108. ⟨10.1063/1.4991558⟩

International audience; The intermittency of turbulent superfluid helium is explored systematically in a steady wake flow from 1.28 K up to T > 2.18K using a local anemometer. This temperature range spans relative densities of superfluid from 96% dow

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc4c69550e999b139bb85721cf29086f

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