Karman vortex street parametrization with image processing application

The vortex flowmeter: various methods of investigating phenomena

“…A decrease in the local convection velocity near the bluff body has been confirmed. This is closely consistent with the results obtained in numerical modelling [92].…”

“…Investigations carried out by Pankanin et al [83,89,90] were based on the application of the direct injection tracer technique with air bubbles and a dyed fluid as markers. The method relies on the injection of a marker (air bubbles or dyed fluid) into the flowing fluid.…”

“…A practical application of image processing in determining the geometrical parameters of the Karman vortex street has been presented in [90]. The proposed technique is based on analysis of individual pictures.…”

“…Other approaches to the problem of modelling the phenomena appearing in the vortex meter should be also mentioned. Phenomenological models based on the observation of physical phenomena appearing in the vortex meter and then their description with simple equations have been proposed by Ahlborn et al [104] and by Pankanin et al [92,105,106]. In spite of a simplified approach to the problem, their results make possible further recognition of the phenomena and hence their better understanding.…”