Electrolytically generated hydrogen bubbles rise with the flow, flow around the model and visualise the flow. Different models are available: drag bodies (e.g. aerofoils and cylinders) or changes in cross-sections. Fine gas bubbles are perfectly suited to visualising flow fields. Due to analogies, many flow processes that occur in air can also be demonstrated by experiments in water. Water flows from bottom to top through the experimental section. The trainer consists of a vertical experimental section in which an interchangeable model is inserted.
Learning Objectives And Experiments:
Vortex formation, demonstration of Karman vortices
Qualitative observation of the velocity distribution in laminar flow
Visualisation of two-dimensional flows
Flow separation
Analogy to air flow
Streamline course in flow around and through models.
Visualisation of flow fields by using electrolytically generated hydrogen bubbles
Platinum wire as cathode and stainless steel plate as anode for electrolysis
Different flow velocities via variable-speed circulating pump
Flow straightener and glass spheres ensure consistent and low-turbulence flow
Shallow water channel fitted with indirect LED illumination along the experimental section
Setting power (with display), pulse and pause duration of the power and the flow velocity in the water channel
Various models are included: aerofoil, rectangle, straight plate, curved plate, cylinder (various sizes), Various models for changes in cross-section.
