Fig. 2: Schematics of large-eddy simulation (LES) computational domain.

Lx and Ly are length and width of the computational domain, respectively; LC is the size of the urban area; L is the size of a repeating unit; D is width of the building. The width between the two dashed lines is LC/5. The 9 buildings are only shown for illustration purpose and each case contains different numbers of aligned buildings.