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Title:
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Numerical simulations of turbulent natural convection coupled and uncoupled with radiation
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Author:
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Capdevila Paramio, Roser; Lehmkuhl Barba, Oriol; Trias Miquel, Francesc Xavier; Colomer Rey, Guillem; Pérez Segarra, Carlos David
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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 · 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
-Heat -- Convection -- Mathematical models
-Calor -- Convecció -- Models matemàtics |
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Rights:
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Document type:
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Article - Published version
Conference Object |
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