[HTML][HTML] On vortex evolution in the wake of axisymmetric and non-axisymmetric low-aspect-ratio accelerating plates
JN Fernando, DE Rival�- Physics of Fluids, 2016 - pubs.aip.org
Impulsively started, low-aspect-ratio elliptical and rectangular flat plates were investigated to
determine the role of geometric asymmetries on vortex evolution. Dye visualizations, force
measurements, and particle image velocimetry were used throughout to characterize the
variation between shapes. For all the shapes studied, aspect ratio was observed to have the
largest influence on force production and vortex evolution. Non-uniform curvature and edge
discontinuities characteristic of ellipses (with aspect ratios other than one) and rectangles�…
determine the role of geometric asymmetries on vortex evolution. Dye visualizations, force
measurements, and particle image velocimetry were used throughout to characterize the
variation between shapes. For all the shapes studied, aspect ratio was observed to have the
largest influence on force production and vortex evolution. Non-uniform curvature and edge
discontinuities characteristic of ellipses (with aspect ratios other than one) and rectangles�…