1,727,631 research outputs found
Le voyage de Hierusalem et avtres lievx de la Terre Ste, faict par le Sr. Bénard Parisien Chevalier de l' Ordre dv St. Sepvlchre de Nre Seignevr Iesvs Christ. Ensemble son retour Par L' Italie, Suisse, Allemagne, Holande et Flandre, En La tres Fleurissant
No full textPreface: , Bénard, NDedication: Charles de Gonzague de Cleues, Duc de Niuernois & RetheloisContent description: Side notesIllustration: 2 (Maps ,varia ,)Pagination: PP16+759P+1PPVolumes: 1Text Genre:ProseIllustration: 2 (χάρτες ,άλλα θέματα ,
Lagrangian Raylaigh-Bénard convection
No full textUsing passive tracers as sensors, we obtain Lagrangian measurements of tracers position, velocity and temperature in Rayleigh-Bénard convection at Ra=10^7-10^9. We report on statistics of temperature, velocity, and heat transport (Nusselt number). We observe that the Nusselt number is characterized by a largely intermittent behavior, likely due to the interaction of temperature with turbulent velocity fluctuations
Large scale circulation in turbulent Rayleigh-Bénard convection
No full textStatistical properties of turbulent Rayleigh-Bénard convection (RBC) are investigated experimentally in a cylindrical cell of aspect ratio one. We specifically analyze the large scale circulation of RBC based on measurements of temperature fluctuations by small Ge sensors placed inside the cell. The resulting dependencies of Reynolds numbers on Rayleigh number up to 2x10^13 are compared to available theoretical and experimental results for similar geometries
Tuning Transitions in Rotating Rayleigh-Bénard Turbulence
No full textRayleigh-Bénard convection is a canonical system for the investigation of buoyancy-driven natural convection phenomena which abound in nature and technology. Under the influence of rotation and depending on the system parameters, the flow exhibits different regimes with disparate heat transfer characteristics even in the turbulent state. The present study attempts to tune the transitions between these regimes and thus control the heat transfer in practical applications. In particular, we explore the effect of addition of neutrally-buoyant thermally-conducting particles to the fluid. Following an experimental approach, we study the flow structure and heat transfer as functions of particle concentration and system parameters
Algérienne : valse pour piano / Léonie Bénard
No full textTitre uniforme : Bénard, Léonie (18..-19.. ; compositeur). Compositeur. [Algérienne. Piano]Piano, Musique de -- +* 1900......- 1999......+:20e siècle:Valses (piano) -- +* 1900......- 1999......+:20e siècle
The heat transport in Rayleigh-Bénard convection: local scaling exponents
No full textUsing infrared thermography, the dimensionless local wall heat fluxNu(x; y) has been measured with high spatial resolution. The measurements at the heating plate of a cubic Rayleigh-Bénard cell show that the scaling exponent α in the Nu / Ra α scaling law depends on the position with respect to the surface. The results have been obtained in a small aspect ratio cell with αx = 1,αy = 0:26 and clearly show an effect of the sidewalls on the local and therefore also on the global scaling of the heat transport
Reynolds numbers near the ultimate state of turbulent Rayleigh-Bénard convection
No full textWe report on measurements of the mean-flow Reynolds number ReU and the rms fluctuation Reynolds number ReV in turbulent Rayleigh-Bénard convection as a function of the Rayleigh number Ra for 4 x 1011 < Ra < 2 1014 and Pr ' 0:8. Both can be described by the same power law with an effective exponent = 0:44, in agreement with predictions for ReU but in disagreement with predictions for ReV
Gavotte-Julia : pour piano / par J. Bénard
No full textTitre uniforme : Bénard, J. (18..-19.. ; compositeur). Compositeur. [Gavotte-Julia. Piano]Piano, Musique de -- +* 1800......- 1899......+:19e siècle:Gavottes (piano) -- +* 1800......- 1899......+:19e siècle
Multiple transitions in rotating turbulent Rayleigh-Bénard convection
No full textSharp transitions between potentially different turbulent states are unexpected because one might think that they should be washed out by the prevailing intense fluctuations and short coherence lengths and times. Contrary to this expectation, we found a sequence of such transitions in turbulent rotating Rayleigh-Bénard convection as the rotation rate was increased. This phenomenon became most prominent at very large Rayleigh numbers up to 2 × 10^12 where the fluctuations are extremely vigorous. It was found in the heat transport as well as in the temperature gradient near the sample center. We conjecture that the transitions are between different large-scale structures which involve changes of symmetry and thus can not be gradual
Pendant le bal : valse pour piano / par J. Bénard
No full textTitre uniforme : Bénard, J. (18..-19.. ; compositeur). Compositeur. [Pendant le bal. Piano]Valses (piano) -- +* 1800......- 1899......+:19e siècle:Piano, Musique de -- +* 1800......- 1899......+:19e siècle
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