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https://hdl.handle.net/2440/66579
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Type: | Journal article |
Title: | CFD studies of indoor airflow and contaminant particle transportation |
Author: | Tian, Z. Tu, J. Yeoh, G. |
Citation: | Particulate Science and Technology: an international journal, 2007; 25(6):555-570 |
Publisher: | Taylor & Francis Inc |
Issue Date: | 2007 |
ISSN: | 0272-6351 1548-0046 |
Statement of Responsibility: | Z. F. Tian, J. Y. Tu & G. H. Yeoh |
Abstract: | This article presents a numerical study of indoor airflows and contaminant particle transportation in three ventilated rooms. The realizable k - ε model is employed to model the air-phase turbulence, while the Lagrangian particle tracking model is utilized for the particle-phase simulation. The predicted air-phase velocities and contaminant particle concentrations are validated against the experimental data obtained from the literature. In the first case, the realizable k - ε model successfully captures the flow trend and reasonably predicts the airflow velocity. The realizable k - ε model under-predicts the vertical air velocities along the vertical inlet jet axis by 11% at x = 0.219 m, which is slightly better than the standard k - ε model error of 17%. In a two-zone room case, the realizable k - ε model, combined with a Lagrangian particle tracking model, predicts the particle concentration decay with the highest normalized difference being 24%. In the third case, the influence of particle size, location of particle resource, and particle-wall collision on the particle concentrations is investigated by the realizable k - ε model and the Lagrangian model. It is found that for relatively small particles (diameter ≤ 10 μm), the particle concentration may be insensitive to the particle diameter. In addition it has been observed that the particle-collision model may have considerable effect on the particle concentration prediction. Copyright © Taylor & Francis Group, LLC. |
Keywords: | CFD contaminant particle indoor airflow Lagrangian model realizable κ-ξ model |
Rights: | Copyright © Taylor & Francis Group, LLC |
DOI: | 10.1080/02726350701492728 |
Published version: | http://dx.doi.org/10.1080/02726350701492728 |
Appears in Collections: | Aurora harvest 5 Mechanical Engineering publications |
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