紊流

In k-ε model, we find the MARS and LUD differential schemes are much accuracy than lower differential scheme.

在k-e紊流模式下，差分法则使用MARS与LUD比使用UD会更接近实验值。

First of all, this paper establishes the simulation method for fluctuating wind with a multivariate normal distribution model and an autoregressive filter. On the basis of simulation results of the wind field, the time dispersion of the buffeting forces by turbulent wind is achieved.

首先，本文利用多变量正态分布模型并结合线性滤波法的自回归模型建立了脉动风的仿真模拟方法，从而实现了对紊流抖振力的时间离散。

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

采用 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。

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 are obtained.

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。

Thirdly, the standered SIMPLE algorithm of Patankar forsolving tWo-dAnensional elliPtic kind equations in orthogonal coo-rdinates is developed, A gerneral comPuter program for solvingequations goveming the laxninar flows and tubulent flows usingcolocated grids in orthogonal coordinates is built.

在S.V Patanker求解二维定常椭圆型方程的SIMPLE程序的基础上，加进同位网格的内容，编制了层流、紊流计算程序，用1）平行平板层流；(2）后台阶层流：（3）正方形方腔层流自然对流三种典型流动状态检验了层流同位网格SIMPLE计算程序，结果显示与一般规律及理论解吻合甚好。

The formulas derived show that FAM is more accurate and reasonable than finite difference method and finite element method , also, on the element partial differentiation of dynamic Reynolds equations with respect to circumferential and axial direction is directly obtained by finite analytic solution.

本文在详细分析目前流体润滑轴承层流、紊流润滑理论及轴承-转子系统稳定性理论的基础上，提出了将有限分析法用于计算动压、静压、动静压轴承的静特性和动特性系数，并推导了相应的计算公式。

Then flow conservation equation, k-ε turbulence model, particle movement model and numerical schemes are detailed.

较详细地介绍了CFD中流动控制方程、紊流模型、粒子运动模型，以及数值方法。

Results of a theoretical study on random motion of a particle in turbulent fluid flow are presented in this paper.

本文应用随机过程论和统计物理学的理论，研究紊流中悬浮颗粒的随机运动。

The system input in this case is turbulent air which produces random pitching motion of the vehicle .

在此情况下，系统的输入是紊流大气，它使飞行器产生随机俯仰运动。

The system in put in this case is turbulent air which produces random pitch in g motion of the vehicle.

在此情况下，系统的输入是紊流大气，它使飞行器产生随机俯仰运动。

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。