辐射防护2024，Vol.44Issue(4)：391-402,12.
网格尺度对三维水动力模型模拟滨海地区潮流特性影响的数值分析
Numerical analysis of the effect of mesh scale on the tidal characteristics of coastal areas simulated by 3D hydrodynamic model
摘要
Abstract
In this paper,a three-dimensional hydrodynamic model of Sanmen Bay is constructed.Different mesh scales are set up after comparing and analyzing the calculation results with the measured data,and the tidal current characteristics of three sections and four typical points are analyzed.The results show that:when the study water is a bay with many harbor branches and complex topography,the relative deviation of the numerical simulation value will increase with the mesh scale.When the mesh scale increases to a certain value,the relative deviation will stabilize due to the accumulation of multiple errors.The topography is a key factor affecting the calculation of tidal currents.The tidal range and current velocity values in the inter-tidal waters with drastic topographic changes and small water depths are relatively large,while in the flat areas with large water depths,they are almost unaffected by the mesh scale.The current direction has a low sensitivity to the mesh scale and has no obvious relationship with the mesh scale.The horizontal vortex viscosity coefficient is positively correlated with the mesh area and the mesh area has a greater effect on the current velocity deformation rate Sij at the larger places.Comprehensive analysis shows that,in the calculation of tidal currents,it is necessary to encrypt the mesh in the shore with complicated topography,inter-tidal zone with small water depth and islands,and to determine the appropriate mesh scale by considering the factors of calculation time,stable convergence of the model calculation and the accuracy of the calculated values,so as to make the calculation results meet the requirements of accuracy.关键词
三维水动力模型/网格尺度/潮流特性/数值模拟Key words
three-dimensional hydrodynamic model/mesh scale/tidal wave characteristics/numerical simulation分类
资源环境引用本文复制引用
刘姣男,韩丽娟,乔建浩,郝瑞霞..网格尺度对三维水动力模型模拟滨海地区潮流特性影响的数值分析[J].辐射防护,2024,44(4):391-402,12.基金项目
山西省基础研究计划——自由探索类项目(202103021223079) （202103021223079）
山西省回国留学人员科研资助项目(2021-051). （2021-051）
