摘要
采用σ坐标变换,将具有自由面的三维非线性潮波微分方程转换为模型所采用的模式方程;运用三角网格有限差分格式,将该模式方程和泥沙扩散方程分别离散,提出了一种新的三维潮流和泥沙运动的数值模拟方法,并与理论解进行了比较.对渤海湾湾顶典型潮潮流与泥沙运动进行了数值模拟,以较高的分辨率揭示了该海域潮流与泥沙运动的典型特征。
Using the σ-coordinate,the 3D nonlinear tidal-wave equations with free surface were converted to the modelling equations,and then applying the finite differrence scheme in triangle patterns,a new 3D numerica1 simulation of tidal current and sediment transportation was put forward. The calcu1ated results are in agreement with the theoretical vertical distribution solutions of the velocity and silt content in constant even current. The model has been applied to simulate the typical tidal current and the sediment transportation in north part of the Bohai Gulf.Reasonable agreement is found between the measured data and the model results.
出处
《天津大学学报》
EI
CAS
CSCD
1999年第5期573-579,共7页
Journal of Tianjin University(Science and Technology)
关键词
三维模型
潮流
有限差分
泥沙运动
数值模拟
3D model otcoordinate tidal current sediment finite differrence scheme in triangle patterns