2012/10/15 by J. H. Lee, Y. S. Kwon, Yongseok Kwon +8 · 2 citations
Engineering · Mathematics · Physics and Astronomy · #Acoustics #Aerospace engineering #Boundary (topology) #Boundary layer #Boundary layer thickness #Eddy #Engineering #Entrainment (biomusicology) #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Fluid Dynamics and Turbulent Flows #Fuselage #Geology #Mathematics #Mechanics #Meteorology #Particle Dynamics in Fluid Flows #Physics #Reynolds number #Turbulence #Vortex #Water tunnel #Wind tunnel #physics.flu-dyn
paper · pdf · doi:10.48550/arxiv.1210.3881
published in arXiv (Cornell University) (Cornell University) · This submission contains two video files for the Gallery of Fluid Motion
arxiv created 2012/10/15 · openalex publication_date 2012/10/15 · arxiv updated 2012/10/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
This fluid dynamics video submitted to the Gallery of Fluid motion shows a turbulent boundary layer developing under a 5 metre-long flat plate towed through water. A stationary imaging system provides a unique view of the developing boundary layer as it would form over the hull of a ship or fuselage of an aircraft. The towed plate permits visualisation of the zero-pressure-gradient turbulent boundary layer as it develops from the trip to a high Reynolds number state (Reτ≈ 3000). An evolving large-scale coherent structure will appear almost stationary in this frame of reference. The visualisations provide an unique view of the evolution of fundamental processes in the boundary layer (such as interfacial bulging, entrainment, vortical motions, etc.). In the more traditional laboratory frame of reference, in which fluid passes over a stationary body, it is difficult to observe the full evolution and lifetime of turbulent coherent structures. An equivalent experiment in a wind/water-tunnel would require a camera and laser that moves with the flow, effectively `chasing' eddies as they advect downstream.