Journal
BUILDING AND ENVIRONMENT
Volume 62, Issue -, Pages 45-54Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.buildenv.2012.12.020
Keywords
Computational Fluid Dynamics (CFD); Detached Eddy Simulation (DES); Eulerian drift flux model; Lagrangian model; Aircraft cabin; Office
Funding
- National Basic Research Program of China (The 973 Program) [2012CB720100]
- International Science and Technology Collaboration Program of Tianjin Commission of Science and Technology [1OZCGHHZ00900]
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It is important to accurately model person-to-person particle transport in mechanical ventilation spaces to create and maintain a healthy indoor environment. The present study introduces a hybrid DES-Lagrangian and RANS-Eulerian model for simulating transient particle transport in enclosed environments; this hybrid model can ensure the accuracy and reduce the computing cost. Our study estimated two key time constants for the model that are important parameters for reducing the computing costs. The two time constants estimated were verified by airflow data from both an office and an aircraft cabin case. This study also conducted experiments in the first-class cabin of an MD-82 commercial airliner with heated manikins to validate the hybrid model. A pulse particle source was applied at the mouth of an index manikin to simulate a cough. The particle concentrations versus time were measured at the breathing zone of the other manikins. The trend of particle concentrations versus time predicted by the hybrid model agrees with the experimental data. Therefore, the proposed hybrid model can be used for investigating transient particle transport in enclosed environments. (C) 2013 Elsevier Ltd. All rights reserved.
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