Preliminary communication

https://doi.org/10.17559/TV-20230205000324

Wind Load of Low-Rise Building Based on Fluent Equilibrium Atmospheric Boundary Layer

Li Zhao ; School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China; Hebei Vocational College of Labour Relations. Shijiazhuang 050093, China
Yuxue Li ; School of Civil Engineering, Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Key Laboratory of Roads and Railway Engineering Safety Control of China Ministry of Education, Shijiazhuang Tiedao University, Shijiazhuang 050043, China

Abstract

The accurate simulation of the self-sustaining equilibrium atmospheric boundary layer is essential in computational wind engineering. In order to solve the problem of poor self-sustaining equilibrium atmospheric boundary layer, the method of adding source terms to the transport equation of the turbulence model was adopted to make the inlet profiles of average wind and turbulence wind consistent with the turbulence model. The consistency of the average wind profiles, turbulent characteristics of the three models at several different positions with and without considering the source terms were investigated respectively according to the corresponding CFD numerical example. Take the TTU low-rise building as an example, the proposed method of numerical simulations of the wind load on the structure surface. The results show that by adding source terms to the transport equations of the SST k-ω turbulence model can better achieve the self-sustaining of the atmospheric boundary layer. The velocity profiles and turbulence characteristics profiles of TTU low-rise building at the entrance and exit have high consistency when adding the source terms. The numerical simulation results of the wind pressure coefficient on the surface of the structure are in good agreement with the wind tunnel tests and field measurement results. It is shown that the method can effectively improve the accuracy simulation of the self-sustaining equilibrium of atmospheric boundary layer. The study conclusion proposes a new idea or research method for modeling the equilibrium atmosphere boundary layer and also provides further CFD simulations in structural wind engineering with theoretical and actual values.

Keywords

equilibrium atmosphere boundary layer; flow field characteristics; low-rise building; simulation; source term

Hrčak ID:

305493

URI

https://hrcak.srce.hr/305493

Publication date:

28.6.2023.

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