Micro-Bubbles/Flip-Flop Flow Mixed Efflux From a Diamond-Shaped Cylinder Bundle

A study on applications of intersecting flows in water reservoir for improvement of water environment problems

“…Furthermore, accompanying flow separation from the cylinders, the intersecting main streams inside the channels include a longitudinal vortex. When air is supplied to a small hole drilled near the x-symbol location between two adjacent cylinders, with an aid of the shearing action of the longitudinal vortex which rotates in the flow direction, many micro-bubbles of less than several ten-micron size (Umeda et al 2007b) are generated.…”

“…Through utilising the unusual pressure gradient induced by the ramming effect which occurred at the narrowest flow cross section of the intersection region in the crossing channels, a reservoir model was developed to improve water-quality environment with the destruction of thermal stratification inside the reservoir (Umeda & A study on applications of intersecting flows in water reservoir for improvement of water environment problems S. Umeda 1 Dedicated to the 80 th Anniversary of Prof. Radoš Řezníček Yang 1998a). The generation of micro-bubbles was also disclosed in diamond-shaped cylinder bundles through utilising the ramming effect (Umeda et al 2007b). Thus, the intersecting flow yields, from fluids engineering viewpoint, various interesting flows depending upon the intersecting angle.…”