对流

"Friction",Friction causes a rolling ball to stop finally.

&，&摩擦力使得一只滚动的球最终停了下来&，，&Friction的中文意思为对流摩擦力加热辐射

The 3-D single phase simulation using CFX for the rod bundle channnel was going on by choosing the reasonable mathematical and physical models and boundary conditions. After a lot of numerical calculations, the sensitivity of gemotery was validated. The flow and heat transfer characteristics for several typical velocities were numerically analyzed and visually showed. The results show that the CFX simulation can be used for designing and optimizing fuel assembly in reactor engineering.

通过选定合理的数学、物理模型和边界条件，采用通用CFD程序ANSYS CFX 10.0对带有AGA-2G定位格架的5×5棒束通道流场进行了三维单相数值模拟，经过大量计算，验证了厚度、刚突等几何敏感性，得到了带定位格架棒束通道内的速度、压力和温度分布，分析了定位格架对流场、温度场的影响，直观地获得了搅混叶片的搅混效果，并将结果同实验值进行了初步比较。

Gourd-shaped cavity was due to the wind tunnel cave open at both ends of the North-South pairs to wear again and hoisted mid-air, to the north,"Xianggui corridor", Nantong bridge between mountains and ocean ridge,"Gap Road", the air in this form.

洞形呈葫芦状，由于风洞两端洞体敞开又南北对穿且高悬半空，北接&湘桂走廊&，南通架桥岭与海洋山之间的&峡道&，空气在此形成强烈的对流，故名&风洞&，于是桂林人又把叠彩山称为&风洞山&。

Taking velocity moment as controlled variable, the formulas were deduced to calculate quasi-3D inverse problem for uniform stream model of guide pulley. According to the theory of two relative flow surfaces and the force analysis of air bubble, the formulas were deduced to calculate quasi-3D direct problem while gas and liquid running in the guide pulley of multiphase pump, and a method was provided to carry on quasi-3D numerical calculation of inner flow filed.

以速度矩作为控制参数，推导出多相泵导轮中均匀流模型的准三维反问题计算公式；基于两类相对流面理论及气泡的受力分析，推导出气、液两相在多相泵导轮中运动的准三维正问题的计算公式，提出一种对多相泵导轮内流场进行准三维数值计算的方法。

A important factor affecting heat transfer ability of double metal rolling fin tubes is gas-side heat transfer coefficient .

影响双金属轧片式翅片管的传热性能的一个重要因素是管外气体一侧的对流换热系数。

The effects of temperature dependence material parameters and potential heat are considered in the program.

在程序中考虑了材料热物性参数的温度相关性、熔化潜热以及对流辐射等对温度场的影响，为进一步分析应力应变场奠定了基础。

It plays an important part in saving energy and decreasing the volume and weight of heat exchanger.

本文所研究的被称为强化传热革命的三维内肋管就是应用于各种换热器中单相强迫对流换热的新型强化传热管。

Single-phase forced convective heat transfer inside tube is an important research realm in the technology of heat transfer enhancement. It plays an important part in saving energy and decreasing the volume and weight of heat exchanger.

管内单相流体强制对流换热是强化传热技术的重要研究领域，其在降低换热器的能源消耗，减小换热器的体积和重量起着十分重要的作用。

In this paper, the application of jet stream exchanging heat and interpositiontechnology to GL style high temperature hot-blast stove is described.

喷流换热及插入件技术应用在GL型热风炉上，在相同的换热面积下与板单面，光管对流换热相比，平均换热系数提高1倍，在相同的换热量下，结构更紧凑。

The physical simulations are performed to investigate the behavior of dynamic recrystallization in W18Cr4V high speed steel and H13 hot-work tool steel during hot deformation.

研究结果表明，对于工模钢流变应力的预测，最优的BP人工神经网络结构为3-9-10-1；采用BP人工神经网络对流变应力进行预测比传统的回归方法具有更高的精度和效率。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。