查询词典 viscous flow

Comparison of the results obtained by simulations and experiments shows that that the advection term has little effect on the results of injection process simulation and on those of free surface shapes in viscous flow injection.

对模拟和实验结果的比较表明，对流项对粘性流注射填充过程和的其中的自由表面形状的模拟结果影响可以忽略。

The numerical solution of incompressible viscous flow over an aerofoil is obtained by H-type grids and a special difference scheme.

本文用H型网格和特殊的差分格式数值求解了粘性不可压缩叶型绕流。

Numerical simulations of the three dimension viscous flow over the SUBOFF-1 model provided by DARPA and other two models are processed by solving RANS equations withκ-εtwo-equation turbulence model and finite volume method, and with SIMPLEC method for pressure-linked terms, central difference shemes for temporal derivative terms, and second-order upwind schemes for convective and diffusive terms.

本文基于RANS方程，采用κ-ε两方程湍流模型来封闭控制方程，采用有限体积法离散控制方程，对于速度压力关联方程，应用协调一致的SIMPLEC算法求解，变化率项用中心差分，对流扩散项采用二阶迎风格式，分别对DARPA提出的裸艇体SUBOFF-1模型以及另外两种回转体模型进行了数值模拟计算。

E. the discrete scheme of FBEM and the inner damping method of continuity equation, the author made numerical analysis of viscous flow field in cascade and cascade experiment in the experimental wind tunnel of Section 204 of Harbin Institute of Technology. The calculated results are in agreement with the experimental ones.

为进一步验证本文提出的有限边界元素法离散格式和连续方程的内部阻尼法的可行性，作者对叶栅内的粘性流场进行了数值分析，并与在哈尔滨工业大学204教研室的实验风洞上进行的叶栅实验结果进行了比较。

However real-world issues reduce the efficiency of actual engines, due to limits of convective heat transfer, and viscous flow.

然而现实世界的问题，降低效率，实际的发动机，由于界限的对流换热和粘性流动。

Based on the Navier-Stokes equations in conservative form derived with respect to nonorthogonal curvilinear coordinates and nonorthogonal velocity components, the numerical method for solving 3D viscous flow has been discussed.

本文基于非正交曲线坐标与相应的非正交速度分量下导得的守恒型N—S方程，讨论了求解三维粘性流动的数值方法，计算中显式时间推进算法与Baldwin—Lomax湍流模型被采用，应用本工作发展的程序，作为算例计算了一个沿径向非等截面环形叶栅的三维粘性流场，得到了诸如三维压力分布，总压损失分布以及十分清晰的二次流动图景等丰富的流场信息。

5 Conditions of viscous flow mean that the rate of flow will be sufficiently low to be directly proportinal to the potential gradient.

答案：粘滞性流动的条件意味着流动速度很低与势梯度成一定的比。

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。

The results show that the alloy undergoes obvious plastic elongation, the specimen fractures into four sections and the diameter changes from 16 mm to 12 mm. The fracture surfaces distribute randomly well developed and partially developed veinal patterns. The deformation behavior of alloy is non-Newtonian flow behavior. About 3% amorphous matrix of extruded specimen transforms crystal, the crystal particles with size of 10-20 mm are precipitated in the amorphous matrix, the thermostability of the extruded specimen was lowered. The failure of the alloy is mainly attributed to non-uniform viscous flow under high strain rate resulting from the hydrostatic extrusion process.

结果表明：非晶合金在高应变速率下产生了明显的塑性变形，直径从16 mm变为12 mm，断裂为4段，且样品断口上随机分布着充分发展与未充分发展的脉纹式切变带，由此可看出非晶合金的变形为非牛顿体变形行为；挤压后的样品约有3％的非晶相发生晶化，在非晶基体上析出10～20 nm的纳米晶粒，导致挤压后非晶合金的热稳定性降低；静液挤压高应变速率变形条件使非晶合金产生非均匀流变，是造成非晶合金断裂的主要原因。

A comprehensive review and expectation about researching status in quo and development trends of viscous flow numerical simulation technique are given in this paper and grids generation methods, numerical computation methods, turbulent model and moving boundary simulation methods are the emphasis study in the paper. On the basic of above job a mathematical model of simulation turbulent flow with free surface is established and triumphantly applied to numerical computation on 2D spillway and 3D spillway with frusta of brake.

本文针对粘流场数值模拟技术的研究现状和发展动态作了比较全面的回顾与展望，重点研究了网格生成技术、数值求解技术、湍流模型技术和动边界模拟技术，在此基础上建立了模拟自由面湍流场的数学模型，并成功地应用到二维溢流坝和带闸墩的三维溢流坝过坝水流的数值计算。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐