Experimental and numerical investigation of Rayleigh-Bénard convection

Experimental and numerical investigation of Rayleigh-Bénard convection - Gerardo Paolillo | Jonathanterrington.com

...2019. Prezzo di listino: € 25,00 Sconto: 5 % Prezzo scontato: € 23,75 ... Experimental and numerical investigation of Rayleigh ... ... ... Scarica il libro di Experimental and numerical investigation of Rayleigh-Bénard convection su kassir.travel! Qui ci sono libri migliori di Gerardo Paolillo. E molto altro ancora. Scarica Experimental and numerical investigation of Rayleigh-Bénard convection PDF è ora così facile! Numerical and experimental investigation of structure-function scaling in turbulent Rayleigh-Bénard convection. Kunnen RP(1), Clercx HJ, Geurts BJ, van Bokhoven LJ, Akkermans RA, Verzi ... Numerical and Experimental Investigation of Phase Change ... ... . Kunnen RP(1), Clercx HJ, Geurts BJ, van Bokhoven LJ, Akkermans RA, Verzicco R. Author information: (1)Department of Physics, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands. [email protected] Numerical and experimental investigation of structure-function scaling in turbulent Rayleigh-Bénard convection R. P. J. Kunnen,1,* H. J. H. Clercx,1,2 B. J. Geurts,1 ... Numerical and experimental investigation of structure-function scaling in turbulent Rayleigh-Bénard convection. Physical review E: Statistical, nonlinear, and soft matter physics . 2008 Jan 8;77(01). 016302. Experimental and numerical investigation of convection heat transfer in transpiration cooling. Author links open overlay panel Pei-Xue Jiang a Lei Yu a Ji-Guo Sun b Jue Wang b. ... The numerical and experimental results also agreed well with known correlations for constant thermophysical properties. Rayleigh-Bénard (RB) type convection occurs when the hot wall is horizontal and located below the cold one. It has been studied for different applications, particularly in electronics. RB convection is governed by coupled non-linear partial differential equations for mass, momentum and energy whose resolution becomes unstable when the Rayleigh number exceeds a critical value. Numerical investigation of Rayleigh-Bénard convection in a cylinder of unit aspect ratio Article in Fluid Dynamics Research 48(1):015503 · February 2016 with 144 Reads How we measure 'reads' In case of turbulent Rayleigh-Bénard convection (RBC) this is usually done by fulfilling different analytically derived criteria for the boundary layers and the bulk flow. In order to analyse if these requirements are sufficient, DNS of turbulent RBC in a cylindrical container with aspect ratio unity and Prandtl number Pr = 0.786 have been performed for Rayleigh numbers Ra up to 10 9 . We report an experimental investigation of the longitudinal space-time cross-correlation function of the velocity field, , in a cylindrical turbulent Rayleigh-Bénard convection cell using the particle image velocimetry (PIV) technique.We show that while Taylor's frozen-flow hypothesis does not hold in turbulent thermal convection, the recent elliptic model advanced for turbulent shear ... Rayleigh-Bénard convection (RBC) is the buoyancy-driven flow of a fluid heated from below and cooled from above. This model of thermal convection is a paradigm for nonlinear and chaotic dynamics, pattern formation and fully developed turbulence (Kadanoff 2001 [1]). Numerical simulation of highly turbulent two-dimensional Rayleigh-Benard convection. Be sure to watch this in HD! Hot (red) fluid rises from the hot bottom plate while cold (blue...

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Gerardo Paolillo
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5,35 MB
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Experimental and numerical investigation of Rayleigh-Bénard convection.pdf

DESCRIZIONE

La convezione di Rayleigh-Bénard - il moto di un fluido guidato da forze di galleggiamento dovute a gradienti di temperatura nella direzione della gravità - gioca un ruolo cruciale in molteplici processi che si verificano spontaneamente in natura o vengono utilizzati nelle applicazioni tecnologiche. La comprensione della sua inerente evoluzione caotica è possibile soltanto mediante tecniche di misura che diano accesso alla distribuzione tridimensionale instazionaria di tutte le grandezze termofluidodinamiche del flusso. Il presente lavoro di ricerca si focalizza sull'applicazione della PIV (Particle Image Velocimetry) tomografica allo studio della convezione di Rayleigh-Bénard rotante e non-rotante all'interno di un cilindro allungato. La progettazione di un apparato sperimentale adatto a questo scopo e i relativi aspetti tecnici sono ampiamente discussi, mentre le misure eseguite in specifiche condizioni operative sono confrontate con i risultati di simulazioni numeriche dirette che includono gli effetti della presenza di una parete fisica.

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