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 [1] visualisation of flow fields by using electrolytically generated hydrogen bubbles [2] platinum wire as cathode and stainless steel plate as anode for electrolysis [3] shallow water channel fitted with indirect LED illumination along the experimental section [4] various models are included: aerofoil, rectangle, straight plate, curved plate, cylinder (various sizes), various models for changes in cross-section [5] flow straightener and glass spheres ensure consistent and low-turbulence flow [6] different flow velocities via variable-speed circulating pump [7] 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 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase UL/CSA optional LxWxH: 900x300x220mm (experimental unit) LxWxH: 410x400x170mm (display and control unit) Weight: approx. 24kg
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