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Modeling Particle Dispersion under Human Activity Disturbance in a Multizone Indoor Environment |
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| Authors: | B Hu J D Freihaut W P Bahnfleth P Aumpansub B Thran |
| Affiliation: | 1Graduate Research Assistant, Indoor Environment Center, Dept. of Architectural Engineering, Pennsylvania State Univ., 104 Engineering Unit A, University Park, PA 16802. E-mail: buh117@psu.edu 2Associate Professor and Indoor Aerosol Laboratory Director, Indoor Environment Center, Dept. of Architectural Engineering, Pennsylvania State Univ., 104 Engineering Unit A, University Park, PA 16802. E-mail: jdf11@psu.edu 3Professor and Director, Indoor Environment Center, Dept. of Architectural Engineering, Pennsylvania State Univ., 104 Engineering Unit A, University Park, PA 16802. E-mail: wbahnfleth@psu.edu 4Graduate Research Assistant, Indoor Environment Center, Dept. of Architectural Engineering, Pennsylvania State Univ., 104 Engineering Unit A, University Park, PA 16802. E-mail: pua108@psu.edu 5Environmental Scientist, Environmental Health Risk Assessment Program, U.S. Army Center for Health Promotion and Preventive Medicine, Aberdeen Proving Ground, MD 21010-5403. E-mail: brandolyn.thran@us.army.mil |
| Abstract: | Human activity is an important factor influencing particle resuspension in the indoor environment. This work studies the applicability of a multizone airflow and contaminant transport model (CONTAM 2.1) in the simulation of indoor dispersion of particles under human activity disturbance. An iterative method is suggested to complement CONTAM 2.1, by tracking the transient particle concentration on floor surface due to dynamic deposition and resuspension process. A three-zone building with a heating, ventilation, and air conditioning system is used as the simulation case to test the convergence and accuracy of this algorithm under different particle-release scenarios. The algorithm shows a very fast convergence speed in the simulation. Comparisons of calculation results between the multizone model and the analytical model show good agreement and verify the accuracy of the multizone model simulation. The airborne particle concentration profiles and human breathing dose are also analyzed for the three-zone building model. |
| Keywords: | Buildings Particles Models Dispersion Human factors Indoor air pollution |