周期性压力作用下单层幂律流底泥流场分布

摘要

基于欧拉坐标系统,对河口底泥流场分布进行了理论研究.泥波由作用在其表面的周期性压力驱动,底泥的流变特性由幂律流流变模型描述,根据浅水波和小变形假设,采用摄动分析展开到一阶得到运动方程,并且用数值迭代法求解非线性微分方程.根据数值计算结果,分析幂律流流动指数和外加周期性压力载荷对泥波流场分布和表面波高的影响.%Based on an Eulerian coordinate system,a theoretical research is presented for the flow field of muddy fluid which is forced by a periodic pressure on the free surface.The muddy fluid has a thin layer,which is described by a powerlaw model.By the assumption of shallowness and deformation,a perturbation analysis is carried out to the first order.The numerical iteration method is adopted to solve these non-linear equations.For the different fluid indices and pressure loads,both the flow field and wave height are examined.