The Osborne Reynolds experiment is used to display laminar and turbulent flows. During the experiment it is possible to observe the transition from laminar to turbulent flow after a limiting velocity. The Reynolds number is used to assess whether a flow is laminar or turbulent. With HM 150.18 the streamlines during laminar or turbulent flow are displayed in colour with the aid of an injected contrast medium (ink). The experiment results can be used to determine the critical Reynolds number. The experimental unit consists of a transparent pipe section through which water flows, with flow-optimised inlet. A valve can be used to adjust the flow rate in the pipe section. Ink is injected into the flowing water. A layer of glass beads in the water tank ensures an even and low-turbulence flow. The experimental unit is positioned easily and securely on the work surface of the HM 150 base module. The water is supplied and the flow measured by HM 150. Alternatively, the experimental unit can be operated by the laboratory supply. The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.
Learning Objectives / Experiments
- visualisation of laminar flow - visualisation of the transition zone - visualisation of turbulent flow - determination of the critical Reynolds number
Features
* Visualisation of laminar and turbulent flow1 * Determining the critical Reynolds number1 * Traditional experiment based on the model of the
[1] visualisation of laminar and turbulent flow in the Osborne 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 a valve [6] flow rate determined by HM 150 base module [7] water supply using HM 150 base module or via laboratory supply
Technical Data
Water tank - contents: 2,2L Pipe section - length: 675mm - dia: 10mm Tank for ink - contents: approx. 250mL
Dimensions and Weight
LxWxH: 400x400x1.140mm Empty weight: approx. 21kg
Required for Operation
HM 150 (closed water circuit) or alternatively water connection and drain
Scope of Delivery
1 experimental unit 1 bag of glass beads 1L of ink 1 set of instructional material
