粘性流

In this paper,a three-dimensional viscous code has been developed to solve simplified Reynolds-averaged Navier-Stokes equations .The viscosity is simulated with viscous body force method.

本文采用一种简化的Navier-Stokes方程的计算方法－粘性体积力方法，计算了Krain叶轮内部流场。

Therefore, if the viscous resistance coefficiency is rational selected, this model can be used in calculating the gas flow field of the filter.

因此，如果多孔介质的粘性队力系数选择合理，该模型可以应用于计算过滤器的气相流场。

With k- e turbulent model and wall function presented by Launder and Spalding, numerical results of viscous resistance coefficient, isoplethic maps of velocity and stress contributions areobtained.

采用k-ε紊流模式及Launder和Spalding提出的壁函数进行数值模拟，得到了该双尾船船体粘性阻力及速度、切应力的等值线分布等结果。

Flow disciplinarian of different PH indicator polymer solution and newtonianliquid in annulus line had been studied, and found speed distributing, vortex,streamline of annulus line, analytic flow field distributing in annulus and eccentricsituation and compared the results with prevenient schloar, some results different fromprevenient results are get, shch as the relation of average velocity and maxiumvelocity is not less with the viscosity exponent under the annular line, the fluid speedaffect the relation.

应用 PIV 分别研究了不同浓度的聚合物溶液以及牛顿流体在垂直环空管道中的流动规律，得到了环空管道中流体的速度分布情况、涡量情况、流线情况，分析了同心和偏心情况下环空管道内的流场分布规律，并与前人的计算结果进行了比较，得出了一些与以前不同的结论：同心情况下平均流速与最大流速的关系，并不是完全与粘性指数 n 值有关系，还与管道内流动的流动速度有关系，当速度较小时，两者的差别就小，速度大时，不符合这种规律。

And the rock mass as the main object of most engineering practice is developed by all kinds of geotechnical action and force in the long geology history to the complex characteristic of continuous medium, crannied medium and granular medium, to the anisotropic and heterogeneous entity with elasticity, plasticity, viscidity, creepocity and rheology.

作为主要工程对象的岩体是在漫长的地质历史发展过程中经受各种地质营力作用而形成的成因和构造复杂，岩性多样且包含了连续介质，裂隙介质和散体介质特征的，兼有弹性、塑性、粘性、流变性的各向异性的非均质地质体。

The eluvial soils on slopes where surface flow occurs are mainly clayey soils with some blocks or debris. They have good grading distribution and a thin soil horizon.

发生坡面流的斜坡残坡积土主要为粘性土，含少量块石或碎石，级配较好，且土层厚度小。

It is demonstrated that existence of inflection point on velocity profile is a sufficient condition, but not a necessary condition for flow instability, for both inviscid and viscous flows.

它表明存在速度剖面拐点充分条件，但不是必要条件流不稳定，都粘和粘性流动。

The present work is mainly focused on developing airfoils numerical simulation methods for steady and unsteady transonic flow.

本文主要发展了计算翼型跨音速定常及非定常粘性绕流的数值模拟方法。

In order to understand the mechanism of pollution process around insulator under the wet condition better,based on the principle of computational fluid dynamics CFD, the numerical model,which was used to analyze three-dimensional two-phase uncompressible turbulent flow field around composite insulator in wet weather and convection-diffusion of dust particles,was established.Then,the dynamic simulation of the general approach,which was used to analyze solid dust particles' wet deposition process around composite insulator with application of CFD software-Fluent,was proposed.

为深入了解绝缘子外部在湿润条件下的积污机理，基于计算流体力学原理CFD建立了求解湿润气象条件下复合绝缘子外部三维两相粘性不可压缩湍流流场的基本控制方程组和尘埃颗粒对流扩散的基本方程，提出应用CFD软件Fluent可对复合绝缘子表面固体尘埃颗粒湿沉降过程进行动态模拟的一般方法。

Under the unstaggered grids, the continuous equation is replaced with the elliptic different one of the pressure, which is derived by the finite-analytic method, and a modilfied new SIMPLER algorithm is proposed to be used as an equal-order pressure-velocity coupling scheme. A simple procedure is applied to determine the cell-face velocity independent of the under-relaxation factor used in solving the momentum equations.

在三维船体贴体坐标系下，运用有限解析解法对控制方程进行离散，采用压力与速度耦合的改进的SIMPLER计算方法结合标准的K—ε方程湍流模式，数值求解RANS方程，并计算了作斜航运动三维船体的粘性绕流场、压力分布以及水动力。

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