Comparisons of Statistics for Wind Speeds Around an Isolated Building Determined by Wind-tunnel Experiment and Numerical Simulation

T. Tong, Y. Li, W. Wang, Ikegaya Naoki

doi:10.5109/7323337

Description

Accurately predicting low-occurrence wind speeds around urban structures is vital for proper building design as well as pedestrian safety. Although Large-eddy simulation (LES) is often used as a high-fidelity model compared to Reynolds-averaged Navier–Stokes (RANS) simulation, current validation processes mainly compare fundamental statistics of the mean and standard deviations of the wind speed. Discrepancies between LESs and wind-tunnel experiments (WTE) remain unclear, particularly regarding physical quantities that characterize the unsteadiness of turbulent flows, such as probability densities, power spectral densities, and high-order moments of the wind speed. This study evaluates LES's results in predicting unsteady wind behavior around a 1:1:2 block model. Two advection schemes in LESs, including first-order upwind and second-order linear were investigated. The results show notable discrepancies, particularly in high-order statistics with WTE consistently exhibiting higher energy levels across all frequencies. These findings underscore the need to refine numerical models to improve their predictive accuracy.

Journal

Proceedings of International Exchange and Innovation Conference on Engineering & Sciences (IEICES)

Proceedings of International Exchange and Innovation Conference on Engineering & Sciences (IEICES) 10 692-699, 2024-10-17

Interdisciplinary Graduate School of Engineering Sciences, Kyushu University

Keywords

Details 詳細情報について

CRID: 1390302315058672384

DOI: 10.5109/7323337

HANDLE: 2324/7323337

ISSN: 24341436

Text Lang: en

Article Type: conference paper

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Abstract License Flag: Allowed

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