Wei Liu22
22Wei Liu
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This paper presented an overview of the tools used to predict ventilation performance in buildings. The tools reviewed were analytical models, empirical models, small-scale experimental models, full-scale experimental models, multizone network models, zonal models, and Computational Fluid Dynamics (CFD) models. This review found that the analytical and(More)
5 Member ASHRAE Student Member ASHRAE Member ASHRAE Fellow ASHRAE 6 7 Air distributions in enclosed environments are crucial to thermal comfort and air quality. 8 Computational fluid dynamics (CFD) has been playing an important role in evaluating and 9 designing various air distributions. Many factors can have influence on the applications of CFD 10 for(More)
The study of airflow and contaminant transport in airliner cabins is very important for creating a comfortable and healthy environment. This paper shows the results of such a study by conducting experimental measurements and numerical simulations of airflow and contaminant transport in a section of half occupied, twin-aisle cabin mockup. The air velocity(More)
This is to certify that I have examined this copy of a master's thesis by Qingyan Chen and have found that it is complete and satisfactory in all respects, and that any and all revisions required by the final examining committee have been made. i Acknowledgements This thesis would not have been possible without the support of many people. With much(More)
  • Wei Liu, Jizhou Wen, Jiangyue Chao, Weiyou Yin, Chen Shen, Daiyi Lai +5 others
  • 2012
18 19 Flow fields in commercial airliner cabins are crucial for creating a thermally comfortable and 20 healthy cabin environment. Flow fields depend on the thermo-fluid boundary conditions at 21 the diffusers, in addition to the cabin geometry and furnishing. To study the flow fields in 22 cabins, this paper describes a procedure to obtain the cabin(More)
Large eddy simulation (LES) with a dynamic subgrid-scale model (DSM) is a powerful tool to predict indoor airflow. Some DSM models need to average the model coefficient over a homogeneous direction or need to use an additional parameter. The others are too complicated. This study proposes a simple filtered dynamic subgrid scale model (FDSM) for indoor flow(More)
UNLABELLED The droplets exhaled by an index patient with infectious disease such as influenza or tuberculosis may be the carriers of contagious agents. Indoor environments such as the airliner cabins may be susceptible to infection from such airborne contagious agents. The present investigation computed the transport of the droplets exhaled by the index(More)
UNLABELLED The exhaled air of infected humans is one of the prime sources of contagious viruses. The exhaled air comes from respiratory events such as the coughing, sneezing, breathing and talking. Accurate information on the thermo-fluid characteristics of the exhaled airflow can be important for prediction of infectious disease transmission. The present(More)
Energy simulation (ES) and computational fluid dynamics (CFD) can play an important role in building design by providing complementary information of the building performance. However, separate applications of ES and CFD usually cannot give an accurate prediction of building thermal and flow behavior due to the assumptions used in the applications. An(More)
Current multizone airflow network models assume air momentum effects, contaminant concentrations and air temperatures are uniformly and homogeneously distributed in a zone of a building. These assumptions can cause errors for zones where air and/or contaminant are not well mixed. A coupled multizone-CFD program has been developed to improve the multizone(More)