Abstract
This study applies the models describing the effect of a neutrally stratified high-Reynolds-number boundary layer on peak wind estimation. A neutrally stratified atmosphere was simulated by ideal large-eddy simulations. The peak factor (PF) model successfully predicted the dependence of the PF on the duration and the evaluation time based on a spectral model containing \(k^{-1}\) slopes at low frequencies. Time-dependent wind peak emergence was evaluated considering the amplitude modulation (AM) concept. For a large part of the atmospheric surface layer, the deviation of the time-dependent mean wind speed played a key role in peak modulation. The effect of a small-scale fluctuation cycle on peak modulation was found to be pronounced, specifically near the surface. It was possible to construct a predictive indicator of a peak event arrival based on the existing predictive model by AM.
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KN is partly supported by JSPS KAKENHI Grant number JP18K13877.
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Nakao, K., Suto, H., Hattori, Y. et al. Peak wind speed modulation by large-scale motions in neutrally stratified atmospheric surface layer. Environ Fluid Mech 22, 663–682 (2022). https://doi.org/10.1007/s10652-022-09840-x
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DOI: https://doi.org/10.1007/s10652-022-09840-x