对流

Chapter 7: The COD〓 distribution in Yangtze River is researched, especially the diffusive coefficient and decay coefficient.

第七章，在流场计算的基础上，以某一流线作边界，重新划分网格，结合环境流体力学的特点对COD浓度的对流、扩散问题进行了专门研究，结合长江及其支流的大量实地资料对扩散系数、衰减系数进行了统计研究及模型率定，得出了一些合理的参数为以后进一步的研究打下了良好的基础。

Based on the previous results, the method to derive creep constructive model from the indoor experiment data is studied, and these study works are also finished: the reasonable method to determine instance elasto-plastic deformation according to experiment curve, the optimization method to perform curve fitting based on experiment data, the universal method to derive creep constructive model from experiment results.

4在已有研究成果的基础上，对从室内试验数据成果导出流变本构模型的方法进行探讨，研究从室内流变试验曲线上确定瞬时弹塑性变形的合理方法，以及对流变试验数据进行曲线拟合的最优化方法，探讨由室内试验数据成果导出流变本构模型的一般性方法。

It also derives calculation formulas of various dispersed coefficient to set up three-dimensional turbulence model of draft tube and confirm the solving method.

对流场控制方程及三维湍流模型进行了深入的分析与研究，导出了通用微分方程，用有限体积法推导了通用微分方程的离散形式，并导出了各种离散系数的计算公式，建立了尾水管的三维湍流模型，并确定了求解方法。

This paper analysis the form condition of running sand, combine with the mechanics pump drainage, based on the seep theory and function with sand, analysis the accelerate effect on being running sand, propose some advices to prevent it finally.

通过分析流砂的形成条件，结合泵排水法的作用机理，基于地下水渗流理论和砂体的作用，分析了其对流砂形成的加速效应，提出了针对泵排法的特有的防治原则和措施。

FLUENT-CFD Software is used to simulate the flow and heat transfer in a rectangular passage with the arrays of circle-shaped, similar-drop-shaped, elliptic-shaped and water drop-shaped columns.

运用FLUENTCFD商用软件对装有圆形、准水滴形、椭圆形和水滴形4种扰流柱叉排阵列矩形通道内的流动和换热进行了三维数值模拟，获得了通道内流场、压力场以及局部对流换热系数分布的基本特征，并对扰流柱通道的换热特性和压力损失特性进行了对比分析。

This paper studies the drying characteristic of medical pill in microwave-convective drying process.

微波对流干燥方法是一种新型的干燥方法，具有干燥速度快、杀菌等一系列优点。

This paper studies the drying characteristic of medical pill in microwave-convective drying process.

微波对流乾燥方法是一种新型的乾燥方法，具有乾燥速度快、杀菌等一系列优点。

In the paper, we investigate, respectively, the unsteady transport properties of heat and moisture in enclosure under constant wall heat flux and constant wall temperature when porous particles are small and Darcy number is lower, the effect of conductivity ratio, heating conditions and other parameters on the heat transfer rate of enclosure when particles are larger and Darcy number are higher.

并分别对多孔颗粒较小时的低Da数封闭腔内的非饱和渗流与传热，及颗粒较大的高Da数封闭腔内的非饱和自然对流行为进行了数值模拟，研究了低Da数时湿分与热量在恒热流与恒壁温条件下的非稳态传递特性，高Da数时封闭腔的传热与流动特性、达西效应以及导热比、加热条件等对空腔传热系数的影响。

Against the specific problems, this paper puts forward corresponding improvement measures including design of the convection field and temperature field, significantly the reduction of water tank evaporation surface, heat preservation of water tank by using block to fix outside protective layer.

针对具体问题提出了改进措施，包括对流场、温度场的重新设计，大幅度减少水箱蒸发面，水箱保温采用木块固定外保护层的方法。

The reactor afterheat under conditions of depressuriza-tion and loss of main heat sink would be removed away through mechanism ofpassive heat transfer by conduction, radiation and natural convection.

失冷和失压工况下，由导热、辐射和自然对流等被动传热机制能将剩余发热安全地传出反应堆。

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％。