查询词典 Stokes theorem

The 3D-flow field in a bell-shaped suction box of a large pumping station of the South-to-North Water Transfer Project is simulated applying Reynolds-averaged Navier-Stokes equation, the standard turbulent model, and SIMPLEC algorithm.

结合南水北调某大型泵站钟形进水流道的设计，采用雷诺平均纳维-斯托克斯方程和标准湍流模型，运用SIMPLEC算法，模拟了钟形进水流道2种设计方案在对称进水工况和偏流进水工况下的三维流场。

Stokes: So he was asphyxiated by hanging?

那他是由于上吊而窒息的了？

The present study focuses on some important aspects of LES technology. It includes review of LES development, fundamental theory and equations and numerical implementation. The procedure of LES consists of filtering Navier-Stokes equation, modeling subgrid scale, closuring the set of equations and solving the numerical equations.

本文对大涡模拟的研究集中在以下几个方面：首先回顾了大涡模拟技术发展的历程，它的理论基础与滤波方程组，以及它在CFD程序中的数值模拟实现：包括滤波NS方程，模化亚网格量，封闭滤波方程，求解滤波方程。

Two-phase flow ; miking layer ; discrete vortex method ; stokes number

两相流；混合层；离散涡方法； Stokes数

In this thesis, different types of stability equations, including Orr-Sommerfeld Equation and Parabolized Stability Equation based on the"slow change"hypothesis and the local method equation which is computed in local range, are derived from Navier-Stokes equation with"small disturbance"hypothesis.

摘要本文从Navier-Stokes方程出发，导出不同形式的流动稳定性方程，包括采用小扰动理论得到的Orr-Sommerfeld方程、基于流向慢变特性而得到的抛物化稳定性方程以及在一小范围内计算的局部法方程。

In this thesis, different types of stability equations, including Orr-Sommerfeld Equation and Parabolized Stability Equation based on the"slow change"hypothesis and the local method equation which is computed in local range, are derived from Navier-Stokes equation with"small disturbance"hypothesis.

本文从Navier-Stokes方程出发，导出不同形式的流动稳定性方程，包括采用小扰动理论得到的Orr-Sommerfeld方程、基于流向慢变特性而得到的抛物化稳定性方程以及在一小范围内计算的局部法方程。

Then, we combine the analysis of the scale-effects with the simplification of the NavierStokes equations, and study numerically the feasibility and efficiency of the generalized diffusion parabolized Navier-Stokes equations and the large-small scale equations applying to the high Reynolds number flows (GNS for laminar flow and LSS for turbulent flow).

首先从数值方法上构造了一些高精度差分格式，然后将尺度效应的分析与流体力学基本方程组的简化近似相结合，通过数值分析和计算研究了广义扩散抛物化NS方程组和流体运动大小尺度方程组用于高Re数流动的可行性和有效性。

Any high Re number flow over bodies consists of three basic flows: the flow with convection-dominant in all spatial directions, the flow with convection-diffusion competition in all directions and the flow with convection-dominant in part directions and convection-diffusion competition in part directions, which is called the interacting shear flow; the features of the three basic flows are different; their simplest conservation equations, i.e. the Euler equations, Navier-Stokes equations and diffusion parabolized NS equations, have different mathematical characteristics; there is a great disparity in domains of the three basic flows and the domains of NS equations are very small. Therefore, adopting Euler-DPNS-NS equation system to analyze and compute high Re number flows over bodies is a logical approach. There exists a mutual examined-complemented relationship of this approach with the usual one of adopting only NS equations.

主要内容如下：（1）高Re数绕流包含3种基本流动：所有方向对流占优流动、所有方向对流扩散竞争流动和部分方向对流占优部分方向对流扩散竞争流动，3个基本流动的特征彼此不同且在流场中所占领域大小彼此相差悬殊，NS方程区域很小，它们的最简单控制方程组Euler、Navier-Stokes和扩散抛物化NS方程组的数学性质彼此不同，因此利用Euler-DPNS-NS方程组体系分析计算高Re数绕流流动就是一个合乎逻辑的选择，该法与利用单一NS方程组的常用方法可以彼此检验和补充。

Beginning with an analysis of understanding and use in scientific research, Stokes recasts the widely accepted view that tension exists between understanding and use, citing as a model case the fundamental yet use-inspired studies by which Louis Pasteur laid the foundations of microbiology a century ago.

司托克斯首先从分析科学研究中的认识与应用这两个目标入手，重申了在认识与应用之间有张力这一被广泛接受的观点，并引证了一个典型事例：巴斯德在一个世纪以前奠定的微生物学，既是基础研究，又是应用研究。

G4→1H6 radiation transitions is measured under excitation by 1.06μm laser radiation from a Nd:YAG. In addition, the 5 anti-Stokes spectrum lines from stimulated Raman scatting are observed in ZnWO4:Tm3+ crystals.

在Nd：YAG激光器产生波长1.06μm强脉冲激光激发ZnWO4：Tm3+单晶时，测得 Tm3＋离子1G4至3H6跃迁的波长在484 nm范围的蓝色上转换荧光光谱。

You can buy sweetened beverages, if that suits you.

你若喜欢的话，可以买些含有糖精的混合饮料。

As many of you are probably aware, Nick and Vanessa were recently faced with an embarrasing sex scandal after naked pictures of the two getting jiggy with it in a hot tub surfaced the net.

正如很多你可能知道，尼克和 Vanessa 最近面临一个尴尬的绯闻事件后，赤裸裸的图片两个越来越jiggy与它在浴缸中的一个热点浮现净。