Abstract
This article presents some results accumulated by author during investigation of an oblique impact of fluid flow on a wall consisting of a spatially periodic rods of very simple oval cross section. The flowfield in the vicinity of the impact is quite complex and strongly Reynolds -number dependent. A part of the jet downstream from the impact is “reflected” from the wall — while the rest, which passes through the empty spaces between the cascade members, leaves the other wall side in what appears to be “refraction” direction.
Highlights
On two different occasions this author was invited to start a research on a fluid flow case that in reality does not exist
This flow “reflection” was proposed expected to be similar to a light beam reflected from the surface a mirror or a body moving back from the impact location due to its elasticity
The results presented here were computed using the RNG modification approach as was offered in the software package
Summary
On two different occasions this author was invited to start a research on a fluid flow case that in reality does not exist. The effective trace lengths may be decreased by the particle rotation (when in a position with light less reflecting faces) as a general rule the lengths of the trajectories in the photographs – as, for example, those shown here in Fig. 7 - provide a useful visual information about the local flow directions and even flow velocities. These visualisation results could be of only qualitative character, not providing numerical data values. It might be noted inFig. that at some higher velocities the threads revealed existence of streamwise oriented vortices
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