基于FVCOM模式的温排水三维数值模拟研究

为反映河口海湾温排水所具有三维结构特征,在基于三维非结构有限体积海岸和海洋模型(FVCOM 2004版)建立的三维潮流数值模型基础上,采用类似的有限体积法开发了一个三维温排水对流扩散模型用于模拟近岸海域温排水的扩散输运过程,并应用该模型对象山港内某滨海电厂的温排水进行了计算,模拟得到了温排水对流扩散过程的三维分布特征,即电厂冷却水温排放后,温差所产生的浮力效应使温排水趋于海水上层输移,海水上层温升与深层温升存在明显的垂向差异.

Numerical simulation of 3D cooling water based on FVCOM

To represent the 3D structure characteristics of the cooling water discharged into estuary and coastal, a high resolution numerical model of 3D cooling water was developed by the finite volume method based on FVCOM tidal flow module. The model can be to simulate the convection and diffusion of the cooling water transport process. The triangular grids were used to fit in with irregular coastal boundary and island and the σ-coordinate transformation was used in the vertical in order to obtain a smooth representation of irregular variable bottom topography in the model. The results of the computed case in the Xiangshan bay showed 3D structure characteristics of the cooling water was evident. Due to the buoyancy effect yielded by the difference of temperature after the cooling water discharged into Xiangshan bay, the cooling water tended towards surface to transport, the difference of temperature in vertical direction was obvious between surface water and deep water.