Conference Paper

Proceedings of eSim 2018: 10th Conference of IBPSA-Canada

Pollutant Dispersion in a Two-dimensional Street Canyons Using Semi-Lagrangian (FFD) Approach and Zero Equation Turbulence Model

Zahra Jandaghian, Mohammad Mortezazadeh Dorostkar, Leon Wang

Abstract: We propose a semi-Lagrangian approach equipped with zero equation turbulence model to investigate the effects of flow and pollutant dispersion in a two-dimensional urban street canyon. The results of online Weather Research and Forecasting (WRF) model are used to provide the initial and boundary conditions and the input data for the CFD model. The airflow pattern is simulated in a 2D urban street canyon to show the capability of the proposed method to predict the airflow in a fast manner. These simulations are conducted for different canyon aspect ratios. We assume that the wind blows at a left angle to the canyon axis. The heat emission of buildings envelop is specified as a line source with a constant emission at building surface. We validate our model by comparing the results with the previous research. The proposed method has acceptable accuracy to simulate urban canyon airflow problems.
Keywords: Urban street canyon, heat emission, Semi-Lagrangian approach, zero equation turbulence model
Pages: 5411 - 5417
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