对流

And then, the direct boundary integral equation of convection-diffusion was obtained by using inverse transformation, which is a discrete by using constant elements.

然后，通过逆变换推导出对流扩散方程的直接边界积分方程和解的积分表达式，并采用常单元来离散边界积分方程，完成对流扩散方程的求解。

The results suggest that the squall line occurred under the favorable weather conditions.

结果表明：飑线是在有利的天气形势下发生的，飑线上强风暴的强度大、高度高；飑线速度剖面图中显示有低层辐散、中层辐合、高层辐散的特征；垂直累积液态水含量迅猛增加到比较大的数值对冰雹预报有很好的指示意义；在冰雹指数产品中以强冰雹概率大于30%作为冰雹预警门限则有较好的效果；边界层辐合线起到了触发对流和加强对流的作用。

The results of cloud image analysis show that the TBB is lower than 230K (-44℃) when the convection grows most prosperously and the area with the brightness temperature difference of lower than -4℃ corresponds to the place where is most affected by the strong thunderstorm. The center of low value with T≤-7℃ corresponds to the strong echo of radar. There is a good correspondence between the strong convective weather and maximum gradient of TBB, which distributes along the moving cloud cluster. The moving path of strong storm is similar to that of the maximum positive gradient of T.

FY-2C卫星云图定量分析结果表明这次飑线过程对流最旺盛期TBB低于230K(-44℃)；长波红外分裂窗双谱组合T≤-4的低值区与强风暴天气影响区域相对应，T≤-7低值中心与强雷达回波区相对应；强对流天气区域与分布在沿对流云团前进方向的TBB梯度最大区域有很好的对应关系，强风暴天气发生区的移动路径与T正梯度最大区域的移动路径相似。

Because the method employs the technique along the characteristics to discretize the convective term and it is unnecessary to determine the boundary condition of the vortex ahead of time, it is very convenient to solve the Navier-Stokes equation and natural convection problem.

该方法对对流项仍采用沿特征线离散技术，并且不需要事先确定漩涡度的边界条件，从而可以方便地求解流函数-漩涡度形式的Navier-Stokes方程及自然对流问题。

Analyses on condition for generating the natural convection show that the natural convection results from the non-conservative body force, so, its enhancement and control can also be achieved by active control of the body force acting on the fluid.

自然对流换热的强化与控制随着微电子和微加工技术的快速发展受到越来越多的关注和重视，但现有技术主要集中于自然对流换热表面的结构设计和优化。

The results show that electric development depends highly on ice phase microphysical processes, and inductive and noninductive charging mechanisms play a role in evolution of electric structure inside thunderstorms.

结果表明：感应和非感应起电机制是雷暴云中电结构形成的主要因素，雷暴云中起电活动的强弱很大程度上依赖于冰相物的出现时间，对流运动与起电过程的关系主要体现在对流运动影响着云中的凝结和冻结过程，从而与冰相物出现的时间有关。

There is obvious vertical wind shear in the former, since in the low layer its cyclonic convergence is caused by three currents from southwest, southeast and north respectively, while in the upper layer its divergence is mainly due to strong northeasterly current.

随着对流的发展，垂直运动的最大值区所在的位置向上伸展，饱和层与中性层也不断向上扩展，对流层中层的中性层结既是对流发展的结果，又可能是其维持机制之一；d。

The numerical solutions for different coefficient and different boundary conditions are obtained for two models of radon field which have respectively source in the side and inside of collapse column.

根据流体场的扩散理论和对流理论，建立了扩散系数与对流速度为常量或变量情况下的氡气场三维状态方程；对于陷落柱柱体侧面有源氡气场和柱体体内有源氡气场两种理论模型，给出了不同系数和边界条件下的数值解的形式。

In normal years, the onset time of summer monsoon over the SCS is approximately in the fourth pentad of May.

通过对各种指标确定夏季风爆发时间一致年份的大气环流特征分析表明，延伸到南海北岸附近地区的海上锋区对流加热和孟加拉湾北部陆地上的对流加热、沿东亚近海向西太平洋推进的冷空气是控制南海夏季风爆发的主要因素。

The experimental results show that the experimental data are less than the correlations values and the experimental data are almost constant. It is the predomination from natural convection to the conjunct effect of natural convection and conduction that results in the phenomenon.

这说明微细铜丝与水的换热由对流为主转变为对流与导热共同作用为主或是纯导热，从而导致了实验值小于常规尺寸下的理论计算值。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失