The results show that the section speed of flow reduces first and increases then when wall surface roughness width and gap increase in the micro channel.
结果表明，壁面粗糙度单元宽度和间隔增加时微通道中截面流速先减小后增加。
The use of hydraulics to the standard Manning formula for trapezoidal cross section analysis, Integrated n-channel drain at the end of the roughness and slope roughness roughness roughness weighted average, Least square method using the principle of channel cross section of the actual measured flow data to deal with mathematical analysis, for a water of the measured data to derive the two constants y1, y2, And then con eludes that the water level flow relationship will he an actual record of the process water into the water to the water level-flow relationship, the use of this relationship which lasted through the combination of water level in EXCEL software once the total amount of water water.
利用水力学曼宁公式对标准梯形断面进行分析，将渠道综合糙率n分解为渠底糙率和边坡糙率的加权平均值，运用最小二乘法原理，对渠道过水断面实际测流资料进行数学分析处理，针对一次放水的实测数据求出与边坡糙率、渠底糙率、底宽、边坡系数、及水力坡降相关的两个系数y1、y2。得出水位－流量关系式，将一次放水过程的实际记录水位代人到水位－流量关系式中，利用此关系式结合水位历时通过EXCEL软件计算一次放水的总水量。
Due to studied non-uniform flow on roughness coefficient and turbulent characteristics, this dissertation extends investigation of open channel flow.
由于研究了明渠非均匀流，本文得到的明渠紊流的研究成果较为全面。
For PCR chip microchannel fabrication, the channel shape and the bottom surface roughness are mainly considered.
对于PCR 芯片微流通道的加工，着重考虑了通道成形和表面粗糙度问题。
The research indicated that the main electric particles forming guiding discharge channel were the electrons released from the process of the breaking up of the negative ions. During 10 microseconds after the laser pulse, the electrode also could guide discharge effectively; and it suggested the new conception of the electrode erosion, and developed new-type running disk electrode, which could discharge for a million times in atmosphere. It also suggested methods of the texturing roller of besmearing with oil film and cathodal discharge in processing. The research of the texturing roller indicated that roughness of 14 microns and the intensified depth of over 200 microns could be got.
研究表明：形成诱导放电通道的带电粒子主要是负离子解离过程释放的电子，在激光脉冲结束后10微秒内，电极都能有效诱导放电；提出了电极损耗的新概念，并研制了新型转动圆盘电极，可在大气中完成上百万次放电，提出了加工过程中负极性放电、工件表面涂介质薄膜放电的毛化工艺方法；并用之对轧辊试件进行了毛化工艺研究，毛化粗糙度可达14微米，强化深度大于200微米。
On the base of obtainning the roughness and seepage parameter, we apply unsteady flow model to simulate water conveyance process and calculate water conveyance capacity of channel in Hebei.
在计算出各河段糙率和渗漏损失参数的基础上，应用非恒定流模型模拟河北段的输水过程，分析并计算了引黄济津河北段现有的输水能力，并提出了提高现有输水能力的工程措施。
This paper proposed a method of equivalent roughness by using a short virtual channel to replace the actual transitional structure in order to simulate the effect of the structure on the water surface elevation and discharge.
为此，提出采用虚拟渠道等效糙率的方法，用来模拟各输水建筑物对渠道中的水位和流量的影响。
In this paper a study of random variation of depth and velocity is performed by means of the random nature of roughness in a typical two dimension uniform flow of open channel.
本文从糙率的随机性质出发，以典型的二度明渠均匀流为对象，对水深和流速的随机变化进行研究。
Also, the chamfer of the stay vanes entrance and the surface roughness of the flow channel were optimized by the numerical investigations.
亦对固定导叶入口冲角、涡壳壁面粗糙度对流动的影响进行了定量分析。
Through analyzing the simulation results, can know that, considering wall slip effect and adopting local heat transfer coefficient can reflect the effects that is temperature change, surface roughness of flow channel and melt elasticity, etc, to micro melt filling flow behavior.
通过模拟结果的分析可知，考虑壁面滑移影响和采用局部热对流系数能够较好的反映温度变化、流道表面粗糙度和熔体弹性等因素对微小熔体充模流动行为的影响。
The resistance of surface flow has a reverse relation with Reynolds number. With the same Reynolds number, the resistance coefficient of surface flow is greater than that of laminar flow in open channel and increases with increased bed roughness.
坡面水流阻力与雷诺数的呈反比关系，相同雷诺数条件下，阻力系数比明渠层流阻力系数要大，且随床面粗糙度的增加而增大。
With regard to natural compound river channel, on the condition that the roughness varies evidently along with the variation of cross section wetted perimeter and the variation of the process water level is larger, the adoption of comprehensive roughness will produce larger error.
对于天然复式河槽，当糙率随着断面湿周变化发生明显变化，且模型过程水位变化较大时，采用一般综合糙率，将会造成较大的误差。
Inversion of Channel's Roughness and Integrated Leakage Coefficient Based on Genetic Algorithm
基于遗传算法的渠道糙率及综合渗漏系数反演
The initial water depth, roughness coefficient and channel bottom slope in the equation are taken as random variables, and then the random differential equation is solved numerically with the application of Liouville theorem.
在模型中将初始水深、糙率系数及渠道底坡视为随机变量，采用Liouville定理〔1〕求解相应的微分方程，得到了较好的结果。
The Influence to Hydraulic Efficiency by Relative Roughness on Surface of Flow Channel in Similar Fans
相似通风机流道表面相对粗糙度对其流动效率的影响
The roughness was simulated by using regular transverse rectangle ribs on the bottom surface of a rectangular channel, and local flow and heat transfer characteristics among ribs along a roughened surface were numerically investigated.
用规则微小横肋模拟固体表面粗糙度，数值模拟和分析粗糙元间局部流动和换热特性。
Bed surface roughness and bursting phenomena in open channel
表面糙率与明渠紊流猝发现象
This study indicates that Manning's roughness coefficients do not be constant for an open channel. In the case of uniform flow, the roughness coefficients decrease with increasing of either water depth or mean velocity of cross section;
本文的研究表明：对于指定的明渠，曼宁糙率系数不为常数，均匀流的糙率系数随着水深和断面平均流速的增大而减小；
The river channel roughness n and longitudinal dispersion coefficient Ex are calibrated through measured water level and salinity data respectively. And then the rationality of model is validated.
利用实测水位、盐度数据率定河道糙率系数（n）和河流纵向离散系数（Ex），并验证所建模型的合理性。
In our study we determine the influence of wall roughness on friction for pipe and channel flows by numerically calculating the entropy production in the flow.
通过对流动中熵产的数值计算，研究了管道和平面通道内流动中粗糙壁面对摩擦的影响。