MR-HM 150.21 Osborne Reynolds Experiment Apparatus Didactic Equipment Hydraulic Workbench Description • visualisation of laminar and turbulent flow • determining the critical Reynoldsnumber • traditional experiment based onthe model of the British physicist Osborne Reynolds The Osborne Reynolds experiment isused to display laminar and turbulentflows. During the experiment it is possible to observe the transition from laminar to turbulent flow after a limiting velocity. The Reynolds number is used toassess whether a flow is laminar or turbulent. With MR-HM 150.18 the streamlines during laminar or turbulent flow are displayed in colour with the aid of an injected contrast medium (ink). The experimental results can be used to determine the critical Reynolds number. The experimental unit consists of atransparent pipe section through whichwater flows, with flow-optimised inlet. Avalve can be used to adjust the flow ratein the pipe section. Ink is injected into the flowing water. A layer of glass beadsin the water tank ensures an even andlow-turbulence flow. The experimental unit is positioned easily and securely on the work surface ofthe MR-HM 150 base module. The water issupplied and the flow rate measured byMR-HM 150. Alternatively, the experimentalunit can be operated by the laboratorysupply. Learning objectives/experiments • visualisation of laminar flow • visualisation of the transition zone • visualisation of turbulent flow • determination of the critical Reynoldsnumber Specification [1] visualisation of laminar and turbulent flow in theOsborne Reynolds experiment [2] water as flowing medium and ink as contrast medium [3] vertical glass pipe section [4] water tank with glass beads to stabilise the flow [5] flow rate in the pipe section can be adjusted via avalve [6] flow rate determined by MR-HM 150 base module [7] water supply using MR-HM 150 base module or vialaboratory supply Technical data Water tank • capacity: 2200mL Pipe section • length: 675mm • inside diameter: 10mm Tank for ink • capacity: approx. 250mL LxWxH: 400x400x1140mm Weight: approx. 16kg Required for operation MR-HM 150 (closed water circuit) or water connection,drain Scope of delivery 1 experimental unit 1 bag of glass beads 1 ink (1L) 1 set of instructional material
