Web1. sep 2024 · The wake of a sphere performing rotational oscillation is expected to be even more complex due to flow reversal induced by change in direction of rotation of sphere. … Web1. apr 2007 · Direct numerical simulation and visualization of three-dimensional separated flows of a homogeneous incompressible viscous fluid are used to comprehensively describe different mechanisms of vortex formation behind a sphere at moderate Reynolds numbers (200 ≤ Re ≤ 380). For 200 < Re ≤ 270 a steady-state rectilinear double-filament wake is …
Drag of a Sphere - Glenn Research Center NASA
Web24. jún 2024 · The wake is very wide and generates a large amount of drag. The alternate shedding is called the Karman vortex street. Here is a computer animation of the shedding, with the flow going from right to left. This type of flow is periodic, it is unsteady but repeats itself at some time interval. Web8. nov 2024 · The wake of a rotating sphere, which is moving near the wall with a uniform speed at various Re, is analyzed using high-speed dye images. The transition from one type to another is captured in flow visualization, and they are complemented by the vorticity and velocity vector fields from PIV measurements to understand the overall wake dynamics. slow hat
Large-scale characteristics of stratified wake turbulence at varying …
Web26. apr 2006 · Abstract. We present experimental results for the wake structure of spheres moving in homogeneous and stratified fluid. In homogeneous fluid, the results of Kim & … Web27. sep 2024 · When the spacing is less than one sphere diameter, the gap flow is steady and axisymmetric, while the last wake is planar symmetric with a weaker turbulence level. … Web19. okt 2010 · As pointed out by Jang and Lee (2007, 2008), the sphere wake at the subcritical flow regime exhibits very complex three-dimensional turbulent flow … slow hard heart beats