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FLB 14.2 – Osborne Reynolds Demonstrator

The goal for this apparatus is to reproduce the experiment designed by Osborne Reynolds visualizing laminar, transitional and turbulent flows, and establishing the Reynolds number that corresponds to each one of them.
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Description

The equipment is designed to be operated on the hydraulic bench (FL01.4, FL FL01.5 or 01.6).

A flow of water mixed with ink in a certain dose is pushed through a needle placed at the entry into a glass tube.

Depending on the flow rate passing through the tube, it can be seen how the ink mixes or not with the water, making a neat line in the case of a laminar flow, or getting mixed with the water in transitional regimes. When it gets to the point of turbulence, the ink will be thoroughly mixed with the water, and it will not be possible to tell them apart.

Learning Objectives
The practices and experiences that can be performed with this equipment are:
    • Study, visualization and determination of the Reynolds number of a laminar regime.
    • Study, visualization and determination of the Reynolds number of a transition regime.
    • Study, visualization and determination of the Reynolds number of a turbulent flow.
Technical Data
Ink
  • Acrylic ink diluted in water: 20 % ink.
Elements
  • Dye tank: approx. 0.4 L.
  • Dye regulation valve.
  • Main tank: approx. 2.3 L.
  • Overflow outlet.
  • Glass spheres.
  • Clean water outlet.
  • Calibrated glass tube.
  • Flow regulation valve.
  • Bubble level.
  • Glass tube water outlet.
  • Water inlet connection.
  • 1 acrylic ink bottle.
  • 3 ink dosing needles.
Dimensions
  • Calibrated glass tube:
  • Internal diameter: 10 mm.
  • External diameter: 15 mm.
  • Length: 700 mm.
Requirements
  • DIKOIN Hydraulic bench.

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