海州湾南侧悬浮示踪的数值模拟

基于三维自由网格、自由表面、原始方程、有限体积海岸大洋环流模型(FVCOM),建立了M2分潮强迫的海州湾高分辨率三维模拟系统。模拟计算结果经验证吻合良好,较好地模拟了此海域M2分潮的潮流场时空分布特征,西部水域流速在0.35~0.65 m/s,至东部水深40 m附近水域,流速可达0.8 m/s;模拟了来自南部表层悬浮示踪粒子,在前期26 h内示踪粒子水平输移随着时空变化,此后,示踪粒子在120.092E,34.462N附近水下0.6~2 m处做M2分潮周期的上下运动,垂向运动平均速度量级约710-5 m/s量级。

Numerical simulation of suspended particle tracking in the south of Haizhou Bay

Based on 3-D unstructured-grid, free-surface, primitive equation, Finite-Volume Coastal Ocean circulation Model(FVCOM), a 3D tidal current model of tidal constituent M2 was established in offshore area of Haizhou Bay. The application of the model showed that the calculated result agrees well with the measured data, and that the model was successful in simulation of the temporal and spatial distribution of tidal field of tidal constituent M2 of this area:the horizontal flow velocity was 0.35~0.65 m/s in the west and more than 0.8 m/s in the east with about 40 m depth. Surface suspended silt particles from the southern was simulated and its temporal-spatio transport trajectories was shown. In the early stage of 26 h, the tracer particle transported horizontally with temporal and spatial variation, thereafter, the tracer particles located in the neighborhood of 120.092 degrees east longitude and 34.462 degrees north latitude, and made up and down movement underwater about 0.6~2 m with about M2 tidal cycle. Its average velocity in vertical direction was about 710-5 m/s in the order of magnitude.