Roughness effects at microscale - reassessing Nikuradse's experiments on liquid flow in rough tubes

摘要: The topic of incompressible fluid flow in rough channels is practical interest many diverse applications. It also forms the basis our understanding fluid-wall interactions, turbulent eddy generation, and their effect on frictional pressure losses. Although this fundamental interest, work area entirely guided by experimental earlier investigators [1–6]. works Nikuradse [4] Colebrook [5] constitute a major milestone from which useful empirical models are derived. As we approach microscale, Nikuradse’s again brought to focus, perhaps time gain an insight into mechanisms affecting interaction channels. In paper, revisited light recent roughness effects microscale geometries.