粘性流

A fourth-order compact finite difference alternating-direction-implicit algorithm is proposed for solving the unsteady-state Navier-Stokes equations of fluid flow and heat transfer using the streamfunction-vorticity formulation. Point-successive overtaxation iteration is used to achieve the steady solutions.

本文构造了求解二维非定常涡量流函数形式Navier-Stokes方程组的一种四阶紧致交错方向隐式差分算法，对包括能量方程在内的离散化方程组采用逐次超松驰迭代法求得稳定解，求解了二维非定常粘性不可压缩流体的流动与传热问题。

The axisymmetric compressor characteristic and the reciprocal time-lag parameters of blade passage have crucial effect on the recoverability of compression systems.

而且压气机的轴对称特性和反映压气机内气体惯性、粘性等时滞影响的α参数等对压缩系统退出旋转失速流型的滞后性有比较大的影响。

In classic theory,it is held that, in Sobolev Space ［H1］3, there is the upper bound of the norm of the constant rotating flow of the incompressible viscous fluid between two closed surfaces. It is inversely proportional to the viscosity of the fluid, and it will go to infinity when the viscosity goes to zero.

经典理论认为，不可压缩粘性流体定常旋转流在Sobolev空间［H1］3中的范数的上界与流体粘度成反比，随着流体粘度的减小，这一上界会无限地增大。

Traffic viscosity is defined as the interference of traffic wave from down stream.

定义来自下游交通波的干扰为交通流的粘性。

Considering of the complex geometry with appendages, the viscous flow around submergible bodies has a very important position in ship flow field research.

不含自由液面水下潜体的粘性流动，考虑其带附体的复杂几何特性，在船舶流场研究中有着重要的学术地位，另一方面，由于潜体所涉及的研究对象，如潜艇、鱼雷等均有强烈的军事背景，受到了国际船舶界的特别重视。

In this thesis, in order to calculate the viscid effect, Euler equations+boundary layer correction method and N-S equations+S-A turbulent model method are introduced.

另外，本文在计算流场的粘性影响时，分别采用了附面层修正+Euler方程和S-A湍流模型+N-S方程两种方法。

This numerical model, derived from viscid incompressible Navier-Stokes equations and finite volume method, aimed to solve the flow field around section undergoing prescribed vibration, and obtained aerodynamic forces series, with the ultimate objective to extract the flutter derivatives of the section.

该模型以粘性不可压Navier-Stokes方程和有限体积法为基础，通过求解作强迫振动的断面绕流场，由得到的气动力时程得到断面的气动导数。

An interpolation method to simulate fluid field numerically is advanced inthe light of general wavelet sampling theory. A number of properties areidentified: easy design, fast speed, high precision, no numerical viscid and wideapplication.

利用一般的小波采样定理，给出一个流场的数值模拟插值方法，该方法最大优点是设计思想简单，速度快，精度高，没有数值粘性，适用范围广。

Numerical study on the viscous flow and the hydrodynamic forces on a ship in turning motion in shallow water.

2浅水域船舶回转运动的粘性绕流场及水动力数值计算研究。

The stream function-vorticity method has been used to simulate two-dimensional transient state of incompressible viscous flow.

采用流函数-涡量法对粘性不可压缩流体的二维瞬态流动进行模拟计算。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失