(Received 18 July 2013; accepted 9 December 2013)
Published Online: 2014
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In this paper, indoor tracer-gas concentration and temperature profiles obtained by a large-eddy simulation (LES) and an inviscid model based on Euler equations are presented. The numerical results from these two approaches are compared with experimental results, available in the literature, for both mixing jet and displacement ventilation strategies. The numerical results reveal that the ventilation strategy changes the dispersion of the tracer gas in the model room to a significant degree. Comparison between LES, Euler, and experimental data shows that the LES model can simulate the tracer-gas concentration and temperature distribution relatively well. Comparison between LES models, Euler, and experimental data show that the LES models simulate the concentration of the tracer gas and the temperature distribution reasonably well. The results of this model coincide well with the experimental results. The same finding was observed by the Euler model. Performance of this approach for evaluation of indoor air quality has been verified for two ventilation strategies. Differences from 3 to 4.7 % were observed between the Euler model and experimental results. The efficiency of ventilation obtained from the Euler model is almost identical to the experimental values with a calculation time less than that obtained by the LES model. The Euler model has its limits only when it comes to high velocities (near air outlets). Generally, a room's air flows are low so in this case, the Euler model can predict the concentration of pollutants effectively.
Chafi, F. Z.
Mechanical Engineering Department, École de Technologie Supérieure, Montréal, QC
Professor, Mechanical Engineering Department, École de Technologie Supérieure, Montréal, QC
Stock #: JTE20130165