【摘要】 本文讨论了二阶Stokes非线性波浪作用下流体微团的平动和变形对污染物输移及混合扩散的影响,推导了相关公式,得出了波浪场作用下污染物输移及混合扩散的基本规律,为进一步研究波浪场中的纵向离散系数提供了一定的理论依据。建立了基于有限元方法(FEM)的对流扩散数学模型,对理论推导的结果进行了验证。研究结果表明:在非线性波浪场中,污染物的混合扩散除了受漂移速度影响外,具有明显各向异性的特征。更多还原

【Abstract】 In this paper the transport and diffusion of contaminants in nonlinear Stokes water waves due to shift and rotation of the micro fluid mass are discussed, and some characters of the transport and diffusion of contaminants in wave field have been obtained. A numerical transport-diffusion model based on Finite Element Method (FEM) is established to verify the theoretical results, and good agreements are obtained. The results show that in wave filed the transport and diffusion of contaminants is anisotropic, apart from being effected by drift velocity.更多还原