对流

It is found that the offset of weight function should change with the Peclet number, and that both the parameter q of radial basis functions and the size of the support domain have a greater influence on the calculation results than the RBF parameter a and the quantity of Gauss integral points.

结果表明：权函数的偏置量需要随着对流强弱而变化，径向基函数参数q、支持域尺寸对计算结果的影响比较大，RBF参数a、Gauss积分子域数对计算结果的影响相对较小。

And the equations are solved coupling iteratively whith PCG method for Laplace equation and Gauss—Seidel method for convective equation.So the distribution of piezometric tube waterhead and saturation can be obtained.And the seepace free surface will be captured automatically according to the distribution of saturation with the concept of VOF.

分别对饱和区的拉普拉斯方程采用预处理共轭梯度法、非饱和区的对流方程采用Gauss—Seidel方法进行耦合迭代求解，得到渗流场的测压管水头分布和饱和度分布，并引入VOF的概念，由饱和度的分布自动扑捉渗流自由面。

A method for generating three-dimensional mixed element type unstructured grids and its application for viscous flow simulations by solving the Navier-Stokes equations are presented.

采用一种改进精度的格心有限体积法对三维 NS方程进行了求解，在加速收敛措施方面，提出了一种新的当地时间步长取定方法来减小质量较差的网格单元对流场计算稳定性和收敛速度的不利影响。

It is difficult to deal with complex geometric regions for numerical simulation of convections.

复杂几何边界是对流换热计算面临的主要难点之一。

This less restrictive flow path design improves flow while maintaining the same excellent throttling characteristics as a globe valve.

这种结构对流道的阻力较小，从而在保持截止阀具有相同的节流性能的基础上改善了截止阀的介质流动性。

Mian colors achieving high speed single way rainbow and scrolling effect 0-100% mechanical linear dimming (tunable from full blanking to full opening effect) Mechanical linear DIMMER and 1-10 times/s high speed STROBE effect Horizontal 450°and vertical 250°scanning range, smooth scanning action and accurate orientation Precise adjustment on horizontal and vertical position Precise speed adjustment on horizontal and vertical position Pattern internal light rotating function,freely adjusting fast , low speed , clockwise and anticlockwise GOBO position adustment Automatic focusing function 3 Prism effect, prism colorwise and anticolorwise rotating Built-in over heat protection and high voltage protection 2 convection cooling-fan,optimize internal air duct way, heat elimination rapidely Compatible with DMX512 international digital singal PFC power factor compensation According to various kinds of safety standards, IP20 protect grades, The cable accords to the CE20/22 standard

PERFORMANCE TRAIT 8种主色彩，同时可作高速单向滚动效果 0-100%机械线性调光（可控制全遮光到全开光效果） 1-10次/秒超高速频闪调整效果水平540度，垂直250度扫描范围，动作平滑、流畅、定位准确水平、垂直运动位置可精确调整位置水平、垂直运动位置速度可调功能旋转图案可正反、快慢自由调节旋转图案角度可单独调整采用电子自动对焦，图案远近均清晰度可自由调整三棱镜及棱镜正、反自由旋转功能二只对流风扇致冷，内部优化风路设计，散热充分良好内置过热保护、触发高压保护接受DMX512国际标准数码信号 PFC功率因素补偿符合各种安全标准，IP20保护等级，电源线符合CE20/22标准

Our factory is specialized in producing any of the following products: iodine sublimation tubes, connectors, Erlian ball on the wall, liquid convection experiments, and demonstration devices, U-type the highest minimum, capillarity, platinum and gold bars, Sheng liquid cylinder liquid internal pressure, small pressure, the nitrogen ball, scale straw, demonstration thermometer, water, electricity and gas, Newton tubes, a variety of test-tube funnel, chemical use test tubes, glass rods, Glue stick, glue the first dropper, all kinds of beaker , flask, measuring cup, graduated cylinder.

我厂专业生产下列产品：碘升华管，连通器，二连球，对器壁，液体对流实验器、演示器，U型最高最低，毛细现象，铂金丝棒，盛液筒，液体内部压强，微小压强计，二氧化氮球，刻度吸管，演示温度计，水电解气，牛顿管，各种试管漏斗，化学多用试管，玻棒，胶棒，胶头滴管，各种烧杯，烧瓶，量杯，量筒。

The results showed that the natural convection of oxygen gas was enhanced by using the gradient magnetic field in which magnetic acceleration is almost identical with gravitational acceleration in direction.

结果表明，磁加速度近似与重力加速度方向相同的永磁梯度磁场布置可使氧气自然对流换热过程得到强化。

In addition, it also studies the influence of model grid size, cumulus parameterization scheme and buffer zone width on model's performance through sensitivity tests.

此外，论文还通过敏感性试验研究了模式的水平分辨率、对流参数化方案和侧边界缓冲区宽度的选取对梅雨期降水过程的影响。

Therefore, the former solar air heater was proved to be able toabsorb more radiant heat energy from the sun to increase the heat convection between the absorber flat plate and the air.

该集热器可增加对太阳辐射热能的吸收，加强吸热体和空气的对流换热。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。