查询词典 convection

In Gregory scheme, not only the importance of the moist static energy is taken into account, but also the common difficulty of the moist convective adjustment scheme, the determination of the temperature profile, is obviated. At the same time, it can give the vertical profile of the apparent heat source Q〓 and apparent moisture sink Q〓. Gregory scheme has the clear physical image that includes the cumulus updrafts, cumulus downdrafts,cumulus induced subsidence in the environmental air, entrainment,detrainment and evaporation. In addition, the interaction between the cumulus and the environment is described by one-dimensional bulk model. It is simpler than the Arakawa-Schubert scheme and has no difficult to decide the spectrum of clouds accurately.It is propitious to operational use because of its simple calculation. Finally, Gregory scheme is not only suitable for moist convection of all types, but also for dry convection.

在该方案中，既强调了湿静力能能量的重要性，又回避了给定临界温度廓线的困难，并且还能给出真实的视热源Q1，视水汽汇Q2的垂直廓线；同时Gregory方案又具有很清晰的物理图象—积云中的上升运动，下沉运动，环境中的补偿下沉运动，以及卷入，卷出和蒸发等；此外，Gregory方案用总体云群模式来描述云与环境的相互作用，比型积云参数化方案简单，它避开了型方案中云谱需要精确设置的麻烦问题，计算容易，简便；最后，Gregory方案在湿对流中适用于浅，深，中不同的对流深度，并且也适用于干对流过程。

According to the theory of flow diffusion and convection, three-dimensional state equation of radon field is established for constant and variable diffusion coefficient and convection rate. 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；对於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。

Since mist mainly alters the convection endotherm dimensionless factor in smoke energy balance equation,obtaining the relationship between convection factor and water mist flow rate would lead to critical condition for flashover restraining.

本文分析了细水雾对多开口受限空间轰燃模型的影响，发现雾滴主要改变烟气层无量纲平衡方程中的对流热损失因子。

LES cooperated with the second order full extension ETG finite element method is applied to simulate three typical problems concerned with convection heat transfer with sufficient experimental data. By comparing the numerical results with the experimental results, LES is proved to be of better accuracy and stability when it is used to solve the problems concerned with convection heat transfer. The time history of the flow field and temperature field can be reflected better, and abundant information of the fields can be obtained. Furthermore the details of the change in the vortex structure can be captured.

应用大涡模拟与二阶全展开ETG有限元离散格式相结合的方法对具有实验基础的三个典型对流换热问题进行了数值模拟，并将模拟结果与相应的实验结果进行对比，证明了大涡模拟应用于对流换热问题中具有较高的稳定性和精度，能够较好地反映流场和温度场的时变过程，提供丰富的温度场和流场信息，捕捉流场中旋涡结构的变化细节，尤其适合于边界形状复杂的区段内含有大尺度各向异性涡的流动和换热问题的计算。

While the second order full extension ETG finite element method is applied to solve the problems concerned with natural convection and forced convection, different discretization schemes are deduced respectively. Then the equations are solved by using the technology of variable bandwidth and mass diagonal matrix.

详细推导了应用二阶全展开ETG有限元法求解自然对流和强制对流问题时的有限元列式，并应用压力校正法与质量矩阵对角化及变带宽压缩存储技术对方程进行求解。

The cases of strong and weak convection are selected based on the interannual variation of OLR. The different evolution characteristics of Qnet in this two cases also mostly owe to Qlat and Qsw. And Qnet should have some relation with OLR, because of their coherent variety that the increaser heat flux from the ocean to atmosphere relates to the enhanced convection.

Qnet在强、弱对流年间的差异随时间的变化同OLR在强、弱对流年间的差异随时间的变化可能有一定的相关性，表现在OLR 30-60天低频分量差异的负值区和Qnet差异的正值区基本一一相对应，表明大气从海洋得到的热量增加时，其上空的对流活动加强，数值上OLR和Qnet呈现较好的负相关性。

As the frontal system's much closer to North Taiwan, small-scale convection became easily to form in the Southwest area this morning as a result of the convergence of prevailing southwesterly and land breeze. Stronger convection also developed in West Taiwan this afternoon.

昨日预测今(29)日锋面系统会南移至华南，朝台湾北部接近，天气更形不稳定，预计台湾西南部清晨至上午间，盛行风与陆风辐合产生的对流云系移入而造成降雨，今日白天随锋面接近，西半部午后有较强对流发展。

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 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。

Experiment and flow visualization are conducted in a water-filled cavity which cover the range of Ra=1×10〓----6×10〓 and Pr=3. 3---6. 5. Similarity theorem is applied in analytical investigations. And core region stratification effects to heat transfer are studied. By using scale analysis, temperature and velocity profiles in turbulent natural convection boundary layer are obtained. The results reveals that for turbulent natural convection in enclosures, the bulk of the cavity fluid is essentially statement with thermally stratified temperature and the only substantial motion is that in the boundary layer along four side walls.

在实验方面，作者在高Ra范围内（Ra〓=1×10'~Ra〓=6×10〓，Pr=3.3~6.3）对封闭空间实验台以蒸馏水为介质进行了换热实验与流动显示；在理论分析方面，作者采用相似原理导出了分析解；研究了核心区温度分层规律及其对换热的影响；另外还运用尺度分析法探讨了紊流自然对流边界层温度与速度分布。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。