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

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.

Examining Wind Flow's Impact on Multi-Storey Buildings: A Quest for Quality Improvement

“…A fundamental prerequisite for achieving congruence in aerodynamic processes between the natural environment and the model lies in geometric similarity. This condition dictates that the dimensions of the actual building and the scale model maintain a consistent linear scale (Zhao et al, 2023).…”

“…In this context, wind tunnel research assumes paramount significance, as it establishes conditions closely mirroring real-world scenarios. Such studies serve to enhance the precision of modeling and validate the findings derived from computer-based methodologies (Zhao et al, 2023). Furthermore, they afford avenues for testing and refining widely employed modeling techniques.…”