流体运动的

For there is no concrete mathematical expression to describe its complicate inner working process and theoretical calculation, and the movement of piston is a kind of nonlinear variable accelerated motion, we have to resort to computer technique to do theoretical research work.

油压夯管锤是高能量输出的油压马达，其工作性质是建立在流体力学、液压传动、运动学、动力学、机械学、波动力学等多学科基础上的流体机械，其内部工作过程和理论计算比较复杂，没有显示的数学表达式，而活塞的运动又是一种非线性的变加速的运动过程，因而，其理论研究必须借助电子计算机。

We did our best to get the optimal methods to make the liquid more atomize, and established a model for gas-liquid mass and heat transfer process of cross-flow RPB.

根据气液两相流在多级离心加速雾化条件下流体的动量与质量方程，分析研究液体的雾化程度、液滴粒径、运动速度与方向、停留时间等，研究液相多级分散的级数、分散方式以及离心力场强度对气液相界面积、传质系数以及气相流阻的影响关系及其规律性，探讨沿旋转床径向使液体均匀雾化的最佳方法，建立旋转床中气液两相的运动与传质数学模型。

Hydrodynamic forces in potential flow, D'Alembert's paradox, added-mass.

势流中作用在运动物体上的流体动力，达朗伯特详谬，附加质量。

Based on theories of hydromechanics, hydrokinetics and heat transfer, a three dimensional transient numerical model of flow and temperature field of the plasma arc welding molten pool with a moving arc is established.

本文根据流体力学、流体动力学及传热学理论，建立了运动等离子弧作用下焊接熔池流场、温度场的三维瞬态数值分析模型。

A boundary integral method is adopted to simulate the bubble motion in the fluid field on the assumption that the fluid field is inviscid, irrotational and incompressible. A corresponding three-dimensional computation program is exploited and the calculated results agree well with the experimental data.

将气泡运动阶段周围的流场假设为无黏、无旋、不可压缩的理想流体，运用边界积分法模拟流场中气泡的运动，并开发了三维计算程序，计算值与实验值吻合较好。

This make it difficult to know the essence of fluidized beds. In order to viewthe motion behavior of a single particle in a fluidized bed in a reasonable cost, thegas-solid flow in a fluidized bed is modeled by a combined approach of discrete particlemethod and computational fluid dynamics, in which the motion ofindividual Particles is obtained by solving Newton\'s second law of motion and gas flowby the Navier-Stokes equation based on the concept of local average.

为了用数值模拟方法来弥补传统实验方法的不足，达到从单个颗粒的尺度上来研究流化床中颗粒的运动和气体流场的剧烈变化情况的目的，本论文建立了基于用Newton第二定律计算单个颗粒运动轨迹的离散颗粒法和基于区域平均值的计算流体动力学方法的数学模型的建立和求解过程；并依据Newton第三定律建立了DPM模型和CFD模型的耦合模型，编写和调试了DPM和CFD的耦合程序。

The influence on the motion of single solid particles in a Newtonian fluid by melting and convection was direct simulated.

本文对牛顿流体内溶解与热对流对单颗粒在垂直管道中的沉降运动进行了直接数值模拟。

This paper simulated the unsteady free water sheet flow on bucket surface using 3-D non orthogonal Body-Fitted coordinate system.

在水斗三维贴体坐标系中，还推导了流体粒子在水斗曲面上的运动控制方程。

In his publications, Newton rephrased his ideas to suit the mathematical idiom of the time, replacing calculations with infinitesimals by equivalent geometrical arguments which were considered beyond reproach.

他用微积分的方法来解决问题的行星运动，形状，表面旋转流体，在地球的扁率，运动，体重滑动的摆线，并讨论了许多其他问题，他的数学原理。

Upon a biological level, Aloe Vera assists in the development of mucous like substances that allow for fluidity of movement throughout the ascending biology; whether that movement be food through the digestive system; fluid through the veins and arteries or lymph; or fluid that suspends the brain in the cranial cavity.

在一个生物性水平上，库拉索芦荟协助粘液类物质的发展，以允许液体的流动遍及提升生物体，不管是食物透过消化系统的运动、液体透过动脉静脉或淋巴腺的运动、或在颅腔里悬系大脑的流体。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。