Study on boundary layer transition of a rotating disk

On the Nonlinear Evolution of a Stationary Cross-Flow Vortex in a Fully Three-Dimensional Boundary Layer Flow

“…These instabIlIties are now commonly referred to as cross-flow instabilItIes and their importance stems from the fact that they arise naturally In many fully three-dimensional boundary layer flows of practical importance, such as In the flow past swept aIrcraft WIngs, rotating flows, and so on. The experimental observations of GS\~T have been confirmed in many subsequent expenments on rotating disk flow, see for instance MalIk et al (1981), Kohama (1984). Kobayashi et al (1980), Kohama et al (1991)' as well In expenments on swept wmgs and cylinders, Poll (1985), Michel et al (1985), Mullel &.…”

“…The more recent experiments on cross-flow mstablbty have conSIdered nonlinear effects and m Kohama (1984), Kohama et al (1991) an explosl\'e secondary mstabilIty, whIch takes the form of ring-like vortices wrapped around the primary cross-flow vortex, has been observed. In the experiments of Muller & Bippes (1988) It has been found that the stationary as well as the non-stationary vortIces attained a nonlmear saturatIOn amplItude.…”

Visualization of Traveling Vortices in the Boundary Layer on a Rotating Disk under Orbital Motion

“…In contrast, the boundary layer on a disk under rotation alone has been investigated in many studies [1]- [3]. Exact solutions of Navier-Stokes equations for the laminar boundary layer flow on a rotating disk were obtained theoretically by von Karman [4] [5].…”

“…When this happens, a boundary layer transition will occur and then about 30 transient vortices will be formed in the outer portion of the laminar region on the rotating disk. Gregory [2], Kohama [3], Kobayashi [6] and others have experimentally visualized these transient vortices.…”

“…Kohama [3] summarized the results obtained by many researchers for boundary layer transitions on rotating disks.…”