Abstract
We conduct Direct Numerical Simulations (DNS) and Large Eddy Simulations (LES) of turbulent mixed convection in parallelepiped convective cells with heated parallelepiped obstacles inside, which represents indoor ventilation in a generic room. The considered Reynolds number \({\mathcal {R}}e\) based on the velocity of the inlet flow and the width of the inlet ducts is up to \({\mathcal {R}}e=1.0\times 10^3\) (and \(1.5\times 10^5\) if based on the height of the cell) and the Grashof number \({\mathcal {G}}r\) based on the height of the generic room and the temperature difference of the heated obstacles and the cooled inlet flows is up to \({\mathcal {G}}r=2.8\times 10^{10}\). The flow for \({\mathcal {R}}e=1.5\times 10^5\), \({\mathcal {G}}r=2.8\times 10^{10}\) and the length of the domain \(\widehat{L}=5\) m is studied by means of LES based on the Smagorinsky model. The results of the simulations reveal a strong dependency of the global flow structures on the Grashof number \({\mathcal {G}}r\), Archimedes number \({\mathcal {A}}r\) and the length of the domain.
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Shishkina, O., Wagner, C. (2014). Highly-Resolved Numerical Simulations of High Rayleigh and Reynolds Number Indoor Ventilation in a Generic Room. In: Dillmann, A., Heller, G., Krämer, E., Kreplin, HP., Nitsche, W., Rist, U. (eds) New Results in Numerical and Experimental Fluid Mechanics IX. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 124. Springer, Cham. https://doi.org/10.1007/978-3-319-03158-3_31
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DOI: https://doi.org/10.1007/978-3-319-03158-3_31
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