2023年12月2日发(作者：金士顿内存条8g多少钱)

Coherent structures in wave boundary layers. Part ry motion期刊名称： Journal of Fluid Mechanics作者： SUMER, B. MUTLU,JENSEN, PALLE M., S?RENSEN, LONE B., FREDS?E, J?RGEN,LIU, PHILIP L.-F.,CARSTENSEN, STEFAN年份： 2010年关键词： Experimental/ boundary layer turbulence; boundary layers; flowvisualisation; fluid oscillations; laminar flow; laminar to turbulent transitions;solitons; vortices/ turbulent solitary wave boundary layers; solitary motionsimulation; water tunnel oscillation; bed shear stress measurement; velocitymeasurement; Reynolds number; laminar boundary-layer flow; vortex tubes; bedshear stress traces; flow visualization tests; flow resistance/ A4735 Waves in fluiddynamics A4725F Boundary layer and shear turbulence A4780A Flowvisualization and imaging A4715C Laminar boundary layers A4730 Rotationalflow, vortices, buoyancy and other flows involving body forces A4715F Stabilityof laminar flows摘要：This study continues the investigation of wave boundary layers reportedby Carstensen, Sumer & Fredse (J. Fluid Mech., 2010, part 1 of this paper). Thepresent paper summarizes the results of an experimental investigation of turbulentsolitary wave boundary layers, simulated by solitary motion in an oscillating watertunnel. Two kinds of measurements were made: bed shear stress measurementsand velocity measurements. The experiments show that the solitary-motionboundary layer experiences three kinds of flow regimes as the Reynolds number isincreased: (i) laminar regime; (ii) laminar regime where the boundary-layer flowexperiences a regular array of vortex tubes near the bed over a short period oftime during the deceleration stage; and (iii) transitional regime characterized withturbulent spots, revealed by single/multiple, or,...内容由中国教育图书进出口有限公司引进