The Design and Evaluation of Vertical Flow Circulating Water Channel for Flow Visualization Considering the Easiness and Safety of Experiment in Laboratory

Abstract

For the purpose of improvement of easiness and safety of flow visualization experiment in the laboratory and miniaturization of the device, we designed a flow visualization channel with flow direction oriented vertically upward rather than general horizontal direction. With this experimental apparatus, problems of deposited particles have been solved, and laser can be handled safely. Also, as an evaluation, the flow velocity in the test section according to the pump inverter frequency is measured using flow visualization experiment and PTV. From the results, we confirmed the operational characteristics and flow velocity uniformity of this channel. Then, as an additional evaluation, the flow field around the cylinder is also observed by this channel, at the result the Karman vortex is observed and the easiness and safety of experiment using this tank in laboratory is also experienced.