对流

Simulation of a typhoon case presents assimilating radar data advanced prediction of typhoon precipitation, intensity and track, enhanced the meso-P scale system on typhoon spiral rain-band.

4登陆台风试验结果表明同化雷达资料可以提高台风降水、强度和移动路径的预报水平，并改善初始场中台风螺旋雨带上的中-β尺度对流系统的结构。

In order to improve higher price of tomato powder s produced by spray-drying or poor quality of it produced by conventional hot-air drying,this paper attempt to produce high quality tomato powder s by convective hot air drying through pretreating to tomato pulp to be dried.

将番茄浆预处理后进行强制对流热风干燥制取番茄粉，考察预处理对不同温度下番茄浆热风干燥时间的影响。

On the basis of those, the flow field of the three-thread screw element with 45mm and 60mm pitch have also been completed simulating calculation in order to analyze by comparison the different effect on flow fields in the screw elements resulted from the different pitch.

以此为基础，还计算了螺距45mm和60mm的三头螺纹元件的相关流场，用以对比分析螺距对流场的不同影响。

After that, the aforementioned flow field in metering section of the triple-screw extruder with single-thread elements and 45mm pitch has been calculated too for the purpose of comparing the difference of flow fields between the single-thread element and three-thread element.

还以螺距45mm的单头螺纹元件为代表，计算了由单头螺纹元件构成的上述流场，分析、比较螺纹头数对流场的不同影响。

The system for a Huabei type three-span experimental greenhouse was evaluated using a computational fluid dynamics model.

具体的工作如下：在均匀的单相系统中，热量的传递有导热，对流和辐射三种基本形式。

The uniformed solar radiation strength curve and daily temperature change curve were used in calculation.

因此，混凝土结构表面的对流换热系数是结构温度场分析时的重要参数之一。

In order to improve the effects of flume on its flow pattern at the tail gate,through analyzing of the influence of several commonly-used tail gates upon their flow patterns at their tail segments, and combining the formula of logarithm velocity distribution and that of free discharge from small orifices, a formula of calculating orifice diameter in a new inclined dragging tail gate is deduced.

为了改善水槽尾门对水槽尾部流态的影响，从几种常用水槽尾门对流态影响的分析入手，结合明渠流速分布对数公式和小孔口自由出流公式，并根据分层来流量与孔口出流量相等的原则，推导出一种新型斜拉孔板尾门开设孔径的计算公式。

Two test pieces with satin surface and rib surface were designed under conditions of different distribution of heat flow density and different air flux.

流场计算中，采用同位网格上的SIMPLER算法和低雷诺数κ-ε湍流模型，对流扩散项采用SMART格式离散；温度场计算中采用整场离散，整场求解。

Flow-field simulation shows that radial pressure gradient goes down fast and air flowrate is nearly directly proportional to the well vacuum and the soil permeability coefficient. It also indicates that stop-off coating will play an important role in SVE.

采用Galerkin三角形有限单元法对复合地表边界的竖井土壤气相抽提稳态流动问题进行了数值模拟分析，模拟结果显示：气相压力沿径向梯度迅速下降，抽提流量与土壤通透系数及真空度呈现高度相关的正比例关系，且地表隔绝覆盖层对流场影响很大。

On the basis of structural features and heat transfer characteristics of a spiral-grooved tube heat exchanger,a three-dimensional geometric model was established for the flow and heat transfer in a heat exchanger with water serving as its working medium.

根据螺旋槽管换热器结构特点及传热特性，建立了以水为工质的换热器流动与传热的三维几何模型。运用有限元分析软件ANSYS模拟出换热器在换热过程中速度场与温度场的状况，分别得到了螺旋槽管内壁与外壁的对流换热系数。

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％。