engleski

Computational model of the cubic building subjected to the atmospheric boundary layer

Computational model was developed for the simulations of the homogeneous neutrally-stratified atmospheric boundary layer (ABL) over the rural, suburban and urban terrain types. This model is based on the implementation of the wind-source term in the momentum equation [1], whereas novelty is the calibration of the source term during the two-dimensional simulations in an empty computational domain [2]. The calculated profiles of the mean velocity, Reynolds shear stress and turbulence kinetic energy are homogeneous along the computational domain, whereas a good agreement with available wind-tunnel measurements was achieved for all three terrain types. Moreover, the calculated pressure gradients along the computational domain are negligible [3], whereas the turbulence kinetic energy decays with increasing the height from the ground surface. The calculated profiles were set as the inflow boundary conditions for simulations of the rural, suburban and urban ABL over the cubic building. The calculated pressure coefficient distributions on the building surface show good agreement with available experimental and computational data and the wind-source term does not have any significant impact on the flow in the vicinity of the cubic building. The obtained drag force coefficients of the cubic building are in agreement with previous relevant studies as well.

homogeneous atmospheric boundary layer ; cubic building ; steady Reynolds-averaged Navier-Stokes equations ; source-term modeling ; surface pressure coefficient ; drag force coefficient

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