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Osborne Reynolds Demonstration Horizontal Tube (SMT-FM-09-B)
Visualisation of laminar and turbulent flow in the
Osborne Reynolds experiment.
Water as flowing medium and ink as contrast
Vertical glass pipe section.
Water tank with glass beads to stabilise the flow.
Flow rate in the pipe section can be adjusted via a
Flow rate determined by SMT-FM-00 base module.
Water supply using SMT-FM-00 base module or via
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 SMT-FM-09-B 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 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 SMT-FM-00
base module. The water is supplied and the flow rate measured by SMT-FM-00. Alternatively,
the experimental unit can be operated by the laboratory supply.