Grau-Bové, J; Mazzei, L; Thickett, D; Malki-Ephstein, L; Strlič, M; (2014) CFD simulation of aerosol deposition in Apsley House, London. In: Malki-Epsthein, L and Spataru, C and Marjanovic Halburd, L and Mumovic, D, (eds.) Proceedings of the 2014 Building Simulation and Optimization Conference. The Bartlett, UCL Faculty of the Built Environment, Institute for Environmental Design and Engineering: London, UK.

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Abstract

We implemented an Eulerian model of aerosol dispersion and deposition in a commercial CFD code (Ansys Fluent). We used this model to simulate the penetration, dispersion and deposition of particulate matter of outdoor origin (larger than 1 µm) in a naturally ventilated historical building (Apsley House, London). The ingress of particles through cracks in the building envelope is estimated using a penetration factor model implemented into the CFD code. We investigate the effects of wind induced leakage, forced and natural ventilation. Our approach successfully predicts the spatial variation of deposition, and offers reasonable estimations of maximum and minimum yearly average deposition rates. Considering only ventilation, the deposition velocity vd = 2.6×10−4±8.6×10−5 s −1 , considering only leakage, vd = 6.6×10−5±4.18×10−5 s −1 . Both values are within the experimentally determined range, with a maximum of vd = 1×10−4 , minimum of vd = 9.2×10−6 , and average of vd = 2.1×10−5 s −1 .

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