Visualisation of flow fields: Visualisation of laminar and turbulent flow processes in a water channel using electrolytically generated hydrogen bubbles. Features: visualisation of flow fields and streamlines by using 
electrolytically generated hydrogen bubbles, illuminated experimental section, different models: drag bodies and changes in cross-section, investigations in laminar and turbulent flow. Learning objectives/ experiments: visualisation of two-dimensional flows, streamline course in flow around and through models, flow separation, vortex formation, demonstration of Karman vortices, qualitative observation of the velocity distribution in laminar and turbulent flow, analogy to air flow.

Specification:

• visualisation of flow fields by using electrolytically generated hydrogen bubbles

• platinum wire as cathode and stainless steel plate as anode for electrolysis

• shallow water channel fitted with indirect LED illumination along the experimental section

• various models are included: aerofoil, rectangle, straight plate, curved plate, cylinder (various sizes), various models for changes in crosssection

• flow straightener and glass spheres ensure consistent and low-turbulence flow

• different flow velocities via variable-speed circulating pump

• setting power (with display), pulse and pause duration of the power and the flow velocity in the water channel. Technical data: Pump with adjustable speed, max. flow rate: 20L/min, Bubble generator, current: 0...200mA, pause: 8,4...1800ms, pulse: 8,4...1800ms, 3 cathodes with platinum wire, Ø 0,2mm, length 30, 50, 75mm, anode, stainless steel plate, L-shaped. Water channel: approx.6L, Experimental section: LxWxH: 550x150x50mm, Illumination: white LEDs on the side walls of the water channel, 230V, 50Hz, 1 phase