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Water Channel

Flow visualisation is an important method to investigate fluid flows. Water channels are a useful and simple tool for the study in particular of two-dimensional flow situations, e. g. flow around profiles or flow through louvers.

The flow in an open water channel is, when the relevant similarity laws are applied, equivalent to the two-dimensional flow through the object under study. Streamlines are usually made visible by applying appropriate particles to the water surface and using long-time exposure photography. Pressure differences, e. g. the pressure loss in louvers, may be obtained by measuring the difference in water height.

The emphasis of water channel studies is usually on a quick and simple flow investigation, e. g. to pinpoint areas of flow separation and to check the velocity distribution in critical cross sections. To avoid flow separation the geometric contours, e. g. of specially formed bends, may be quickly optimised. The I.F.I. water channel is an important tool for optimisation work in industrial aerodynamics and a lab tool of the Department of Aeronautics of the Aachen University of Applied Sciences.