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Title:
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Turbulent natural convection in a differentially heated cavity of aspect ratio 5 filled with non-participating and participating grey media
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Author:
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Capdevila Paramio, Roser; Lehmkuhl Barba, Oriol; Trias Miquel, Francesc Xavier; Pérez Segarra, Carlos David; Colomer Rey, Guillem
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics; Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor |
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Abstract:
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In the present work, turbulent natural convection in a tall differentially heated cavity of aspect ratio 5:1, filled with air (Pr = 0.7) under a Rayleigh number based on the height of 4.5 centerdot 1010, is studied numerically. Two different situations have been analysed. In the first one, the cavity is filled with a transparent medium. In the second one, the cavity contains a grey participating gas. The turbulent flow is described by means of Large Eddy Simulation (LES) using symmetry-preserving discretizations. Simulations are compared with experimental data available in the literature and with Direct Numerical Simulations (DNS). Surface and gas radiation have been simulated using the Discrete Ordinates Method (DOM). The influence of radiation on fluid flow behaviour has also been analysed. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Física::Termodinàmica::Física de la transmissió de la calor
-Turbulent convective heat transfer
-Fluid dynamics
-Mathematical physics
-Física matemàtica
-Dinàmica de fluids
-Turbulències |
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Rights:
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Document type:
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Article - Published version
Conference Object |
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