悬浮物输运的数学模型

为了研究镇江内湖悬浮物的输移运动规律，建立了二维悬浮物输运数学模型。模型考虑了风场及潮流作用下悬浮物的输运，同时还考虑了悬浮物的沉降和再悬浮机制，采用切应力概念确定悬浮物的起悬量和沉降量。在无结构网格上对水流和悬浮物输运方程进行有限体积的积分离散，应用高性能的Osher格式计算水量、动量及悬浮物输运等通量，提高了数值模拟的精度。应用2次大规模水文和悬浮物含量的野外同步监测资料对模型进行了验证。模拟值与实测值吻合较好，表明模型能合理地反映内湖水流及悬浮物的运动规律。

Two-dimensional mathematical model for transport of suspended particulate matters in lakes

A 2-D mathematical model is established to investigate the transport of suspended particulate matters in Neihu Lake in Zhenjiang City,Jiangsu Province.The effects of wind and tide on the movement of sediment transport are taken into account and the mechanism of setting and re-suspending of the suspended matter are also considered.The method of shear stress is applied to determine the re-suspending and setting flux of particulate matters.The discrete technology is adopted to numerically compute the water flow and transport of suspension equations by introducing the finite volume method(FVM) in non-structure grid.The Osher scheme is applied to calculate the water flow and particulate matter transport flux for improving the calculation precision.The validity of the model is verified by the field synchronous monitoring data.