Mengtao Han*, Royzo Ooka, Hideki Kikumoto. Validation of lattice Boltzmann method-based large-eddy simulation applied to wind flow around single 1:1:2 building model. (SCI检索)
发布时间：2021-03-10
点击次数：
- 论文类型：
- 期刊论文
- 论文编号：
- 104277
- 发表刊物：
- Journal of Wind Engineering and Industrial Aerodynamics
- 收录刊物：
- SCI
- 学科门类：
- 工学
- 一级学科：
- 土木工程
- 文献类型：
- J
- 卷号：
- 206
- 期号：
- November 2020
- 关键字：
- Lattice Boltzmann method (LBM); Large-eddy simulation (LES); Bluff body aerodynamics; Pedestrian wind; Outdoor flow; Validation
- DOI码：
- 10.1016/j.jweia.2020.104277
- 发表时间：
- 2020-06-05
- 影响因子：
- 4.082
- 摘要：
- This study conducted a validation for the lattice Boltzmann method-based large-eddy simulation (LBM-LES) applied to flow around a single 1:1:2 building. The flow structures and distribution of time-averaged velocity and turbulent kinetic energy (TKE), particularly at pedestrian height, were examined against data obtained by an experiment and finite volume method-based LES (FVM-LES), in addition to checking the grid independence and solution accuracy of LBM-LES. Results of validation metrics showed that the grid resolution of b/16 and b/32 (b: building's width) achieved similar simulation accuracy and satisfied the acceptance range. However, b/32 gave better reattachment lengths. Furthermore, low accuracies of the velocity and TKE was observed in several areas while using b/16, such as above the roof, around the strong wind area near the sidewall, and in the wake flow area at the pedestrian height. LBM-LES generally showed similar fluctuating velocity characteristics as FVM-LES, including power spectra, and probability densities. However, numerical oscillations probably occurred above the building on the windward side. This study showed that LBM-LES could obtain accurate results for both time-averaged and fluctuating velocities. Moreover, at least b/32 is recommended while simulating pedestrian wind or the reverse flow structures, even though b/16 can obtain satisfactory validation metrics.
- 备注：
- JCR1区，中科院2区
- 上一条：Mengtao Han*, Royzo Ooka, Hideki Kikumoto. Effects of wall function model in lattice Boltzmann method-based large-eddy simulation on built environment flows. (SCI检索)
- 下一条：Mengtao Han*, Royzo Ooka, Hideki Kikumoto. Lattice Boltzmann method-based large-eddy simulation of indoor isothermal airflow. (SCI检索)