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Turbulence Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence Heat and Mass Transfer
September, 14-18, 2009, Rome, Italy

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf


ISBN Print: 978-1-56700-262-1

ISSN: 2377-2816

A numerical study of ventilation flow through a 3-dimensional room with a fan

page 10
DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.2490
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Numerical simulation of ventilation flow through a real-sized 3-dimensional room containing warm air has been performed, using a commercial CFD (Computational Fluid Dynamics) software package. The standard k-ε turbulence model with wall functions is used. Fan’s flow rate only affects significantly the room’s temperature when this rate is low, corresponding to the free-convection-dominating regime. In forced-convection regime, increasing the flow rate results in little change in the room’s temperature, but can also enlarge pockets of undesirable warm air. Positioning a window higher gives rise to more efficient ventilation. An exhaust fan reduces the room’s average temperature significantly more than an in-blowing fan.

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