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Tytuł artykułu
Autorzy
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Warianty tytułu
Konferencja
French-Polish Seminar of Mechanics (19 ; 8-11.06. 2011 ; Perpignan, France)
Języki publikacji
Abstrakty
This study focuses on TLES (Thermal Large Eddy Simulation). We study the influence of thermal boundary conditions on mean and fluctuating profiles for a turbulent bi-periodic channel with a thermal gradient. TLES simulations show that mean profiles of longitudinal velocity, transversal velocities and their fluctuations are not affected by the therm 1 boundary conditions (flux or temperature imposed at wall). Profiles of mean temperature and mean vertical velocity are slightly changed by the thermal boundary conditions. The thermal gradient at wall is stronger and temperature slope in the middle of channel is lower with imposed temperature boundary conditions. Although there are the same in the middle of the channel, temperature fluctuations profiles are very different near to the wall according to thermal boundary conditions. In fact, with flux boundary conditions, the temperature fluctuation profile is similar close to the wall than in the middle of channel; with imposed temperature boundary conditions, theses profiles tend to zero close to the wall. This result is very important for industrial process because thermal fatigue due to thermal fluctuations at wall can damage it.
Czasopismo
Rocznik
Tom
Strony
19--28
Opis fizyczny
Bibliogr. 14 poz., wykr.
Twórcy
autor
autor
autor
autor
- Universite de Perpignan, France
Bibliografia
- Brillant, G., Husson, S. & Bataille, F., 2006, Subgrid-scale diffusivity: wall behaviour and dynamic methods, Journal of Applied Mechanics, 73, No 3, 360-367.
- Brillant, G., Husson, S., Bataille, F. & Ducros, F., 2008, Study of the blowing impact on a hot turbulent boundary layer using Thermal Large Eddy Simulation, International Journal of Heat and Fluid Flow, 51, Issues 7-8, 1996-2005.
- Calvin, C. & Emonot, P., 1997, The Trio-Unitaire project: a parallel CFD 3D code, ISOCOPE.
- Chatelain, A., Ducros, F., Metais, O., 2004, LES of turbulent heat transfer: proper convection numerical schemes for temperature transport, International Journal for Numerical Methods in Fluids, 44, 9, 1017-1044.
- Jimenez, J., Moin, P., 1991, The minimal flow unit in near-wall turbulence, Journal of Fluid Mechanics, 225, 213-240.
- Lagha, M., Kim, J., Eldredge, J. D., Zhong X., 2011, A numerical study of compressible turbulent boundary layers, A IP, PHFLE6, 23, No 1.
- Moin, P., Kim, J., 1982, Numerical investigation of turbulent channel flow, Journal of Fluid Mechanics, 118, 341-377.
- Nicoud, F., Ducros, F., 1999, Subgrid-scale stress modeling based on the square of the velocity gradient tensor, Flow, Turbulence and Combustion, 62, 183-200.
- Sakurai, A., Maruyama, S., Matsubara, K., Miura, T. & Behnia, M., 2010, An Efficient Method for Radiative Heat Transfer Applied to a Turbulent Channel Flow, Journal Heat Transfer, 132, Issue 2.
- Serra, S., Husson, S. & Bataille, F., 2008, Interaction Between a Turbulent Flow and Heat Transfers, High Temperature Solar Receiver (14th International Solar Paces Concentrating Solar Power Symposium), 8 p., Las Vega, Nevada.
- Serra, S., Toutant, A. & Bataille, F., 2009a, Etude de la modelisation thermique d'un ecoulement turbulent soumis a un fort gradient de temperature avec la Simulation des Grandes Echelles Thermique, Congres Francais de Thermique, 6 p., Vannes.
- Serra, S., Toutant, A. & Bataille, F., 2009b, Physical mechanisms of high and transverse temperature gradient effects on solar receiver performances, 6th International Symposium on Turbulence, Heat and Mass Transfer, 10 p., Rome, Italie.
- Serra, S., Toutant, A. & Bataille, F., 2012, Thermal Large Eddy Simulation in a very Simplified Geometry of a Solar Receiver, Heat Transfer Engineering, 33 No 5 (available online in 2011).
- Vrina, M., Ferriere, A., 2008, Development of high temperature air solar receiver based on compact heat exchanger technology, 14th Solar Paces International Symposium, Las Vega.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BWA0-0054-0011