wall roughness

Roughness may be attributable to the nature of the wall substance and the method of its manufacture.

粗糙度可归因于管壁材料性质及其制造方法。

The roughness wall also has an effect on MRT through changing the motion regime of bed.

壁面粗糙度通过改变料床床态对MRT和 MVF施以影响.

It analyzes the concrete reason that the hole-digging grouting pile's roughness has an influence to carrying capacity, summarizes the constructive measures that accrete hole wall roughness. Introduces the concrete construction technique of pressure grouting, and propounds the calculation formula of carrying capacity.

分析了钻孔灌注桩的孔壁粗糙度对其承载力产生影响的具体原因，并总结了一些增大孔壁粗糙度的施工措施，介绍了压力灌浆的具体施工工艺，并提出承载力计算公式。

Turbulent BL Structure: Wake, Wall layers. Inner, Outer Variables. Effects of Roughness.

25紊流边界层结构: 尾流, 壁面层, 内 、 外变数. 粗糙度效应.

Investigations were carried out, under uniform wall temperature and constant heat flux boundary conditions, on heat transfer and frictional characteristics of transverse tube with large roughness for laminar and turbulent flow of oil in a condensation test facility.

在凝结换热实验台上，采用恒壁温法和恒热流法对油品在大粗糙度横肋管中的层流与湍流摩擦阻力与传热特性进行了实验研究。