Visualisation of streamlines in a Hele-Shaw cell, ink as contrast medium Features - two-dimensional, inviscid potential flow - visualisation of streamlines - flow around different models: drag bodies and changes in cross-section - modelling the flow around bodies by overlaying the parallel flow and sources and / or sinks - sources and sinks, individually or in combination Learning objectives/experiments - visualisation of streamlines in -- flow around drag bodies: cylinder, guide vane profile, square, rectangle -- flow through models: nozzle contour, sudden contraction or enlargement -- flow separation, flow with 90° deflection - modelling the flow around bodies by overlaying parallel flow and sources and/or sinks -- formation of Rankine half-bodies -- demonstration of a dipole - analogy between potential flow and other physical systems which are described by the Laplace equation Specification [1] demonstration of potential flow in a Hele-Shaw cell for visualising streamlines [2] flow around supplied models: cylinder, square, rectangle, guide vane profile, various models for changes in cross-section [3] modelling the flow around contours without models by overlaying parallel flow with sources or sinks [4] water as flowing medium and ink as contrast medium [5] Hele-Shaw cell made of two glass plates arranged in parallel with narrow gap [6] upper glass plate, hinged for swapping models [7] bottom glass plate with cross-shaped water connections for generating sources/sinks, can be combined as required [8] grid in the bottom glass panel for optimal observation of the streamlines [9] flow velocity, water inlet and water outlet in sources/sinks as well as dosage of the contrast medium can be adjusted by using valves Technical data 2 glass plates, LxW: 910x585mm - distance between the plates: 5mm - bottom glass plate with eight water connections for sources/sinks Models - 6 drag bodies - 2 changes in cross-section - material: rubber - thickness: 5mm Injection of the contrast medium (ink) - 19 nozzles Tank for contrast medium: 200mL LxWxH: 1350x700x1380mm Weight: approx. 119kg
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