Roughness effects at microscale - reassessing Nikuradse's experiments on liquid flow in rough tubes
Roughness effects at microscale - reassessing Nikuradse's experiments on liquid flow in rough tubes
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发表时间：
2005
影响因子：
1.2
通讯作者：
S. Kandlikar
中科院分区：
文献类型：
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作者：
S. Kandlikar
粗糙通道中不可压缩流体流动的主题在许多不同的应用中具有实际意义。它还构成了我们理解流体壁相互作用、湍流涡流产生及其对摩擦压力损失的影响的基础。尽管这个主题也很有趣，但该领域的工作完全由早期研究人员的实验工作指导[1-6]。 Nikuradse [4] 和 Colebrook [5] 的作品构成了一个重要的里程碑，从中导出了有用的经验模型。当我们接近微观尺度时，Nikuradse 的实验工作再次成为焦点，也许这一次是为了深入了解影响粗糙通道中流体-壁相互作用的机制。在本文中，根据最近关于微尺度流动几何形状中粗糙度效应的实验工作，重新审视了 Nikuradse 的工作。
The topic of incompressible fluid flow in rough channels is of practical interest in many diverse applications. It also forms the basis of our understanding of fluid-wall interactions, turbulent eddy generation, and their effect on the frictional pressure losses. Although this topic is also of fundamental interest, the work in this area is entirely guided by the experimental work of earlier investigators [1–6]. The works by Nikuradse [4] and Colebrook [5] constitute a major milestone from which useful empirical models are derived. As we approach the microscale, Nikuradse’s experimental work again is brought to focus, perhaps this time to gain an insight into the mechanisms affecting fluid-wall interaction in rough channels. In this paper, Nikuradse’s work is revisited in light of the recent experimental work on roughness effects in microscale flow geometries.