彎道湧波模擬之參數適用性分析

Abstract

本研究利用謝(2003)所研發的水深平均二維模式，採用de Vriend (1977) 的二次流速度剖面求解延散剪應力項，將二次流效應納入模式中加以考量。以Bell等(1992)的彎道湧浪實驗為例，對此模式之模擬參數進行合適性分析，並以Bell等(1992)的另一組實驗進行較佳參數的驗證，最後再據以討論彎道二次流效應對湧浪傳遞之影響。

The 2D depth-averaged model proposed by Hsieh (2003) was adopted in the present study. The secondary-current effect was embedded in the dispersion stress terms of the flow momentum equations by adopting the vertical velocity profile proposed by de Vriend (1977). The parameter suitability for the present model have been determined and verified based on the experiment data conducted by Bell et al. (1992). Finally, the secondary-current effect for surge propagation have been analyzed based on the appropriate parameters determined.