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Large-Eddy Simulation of plume dispersion within regular arrays of cubic buildings

Nakayama, Hiromasa  ; Jurcakova, K.*; Nagai, Haruyasu 

In this study, the cubic building arrays with roughness density of 0.16, 0.25 and 0.33 are set up. These surface geometries consist of 20$$times$$6, 25$$times$$7 and 28$$times$$9 arrays in streamwise and spanwise directions, respectively. Three cases of plume source located at the ground surface behind the building in the 6th, 7th and 8th row of the building array are tested. As a result, we can capture the dispersion process of a plume and the spatial distribution of mean and fluctuating concentrations depending on roughness density.

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