An unstructured-grid finite-volume surface wave model (FVCOM-SWAVE): Implementation, validations and applications
An unstructured-grid finite-volume surface wave model (FVCOM-SWAVE): Implementation, validations and applications
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DOI：
10.1016/j.ocemod.2009.01.007
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发表时间：
2009
期刊：
影响因子：
3.2
通讯作者：
J. Qi;Changsheng Chen;R. Beardsley;W. Perrie;G. Cowles;Z. Lai
中科院分区：
文献类型：
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作者：
J. Qi;Changsheng Chen;R. Beardsley;W. Perrie;G. Cowles;Z. Lai
结构网格表面波模型SWAN （simulation Waves Nearshore）已被转换为非结构网格有限体积模型（以下简称FVCOM-SWAVE），用于具有复杂不规则几何形状的沿海海洋区域。在频率空间中使用通量校正输运（FCT）算法，在方向空间中使用隐式Crank-Nicolson方法，在地理空间中使用显式或隐式二阶迎风有限体积格式。FVCOM-SWAVE通过四个理想化的基准测试问题进行验证，重点是数值色散、波流相互作用、在不同水深的浅水区域上的波传播以及基本波增长曲线。结果表明，在矩形几何域中，FVCOM-SWAVE采用的二阶有限体积法与SWAN采用的三阶有限差分法具有相同的精度。应用FVCOM-SWAVE模拟了以缅因湾和新英格兰陆架为中心的美国东北陆架的风源表面波。FVCOM-SWAVE通过对复杂不规则海岸线的几何拟合改进，能够较好地捕捉美国东北海岸深、浅区域表面波的时空变化。
The structured-grid surface wave model SWAN (Simulating Waves Nearshore) has been converted into an unstructured-grid finite-volume version (hereafter referred to as FVCOM-SWAVE) for use in coastal ocean regions with complex irregular geometry. The implementation is made using the Flux-Corrected Transport (FCT) algorithm in frequency space, the implicit Crank–Nicolson method in directional space and options of explicit or implicit second-order upwind finite-volume schemes in geographic space. FVCOM-SWAVE is validated using four idealized benchmark test problems with emphasis on numerical dispersion, wave-current interactions, wave propagation over a varying-bathymetry shallow water region, and the basic wave grow curves. Results demonstrate that in the rectangular geometric domain, the second-order finite-volume method used in FVCOM-SWAVE has the same accuracy as the third-order finite-difference method used in SWAN. FVCOM-SWAVE was then applied to simulate wind-induced surface waves on the US northeast shelf with a central focus in the Gulf of Maine and New England Shelf. Through improved geometric fitting of the complex irregular coastline, FVCOM-SWAVE was able to robustly capture the spatial and temporal variation of surface waves in both deep and shallow regions along the US northeast coast.