F1-19 Flow Channel


F1-19 Flow Channel

The Flow Channel introduces students to the characteristics of flow in an open channel at an elementary level.

  • Demonstrating basic phenomena associated with open channel flow
  • Visualisation of flow patterns over or around an immersed object


The channel consists of a clear acrylic working section of large depth-to-width ratio incorporating undershot and overshot weirs at the inlet and discharge ends respectively. Water is fed to the streamlined channel entry via a stilling tank to reduce turbulence. Water discharging from the channel is collected in the volumetric tank of the hydraulics bench and returned to the sump for recirculation.

A dye injection system incorporated at the inlet to the channel enables flow visualisation in conjunction with a graticule on the rear face of the channel.

Models supplied with the channel include broad and sharp-crested weirs, large and small-diameter cylinders and symmetrical and asymmetrical aerofoils. These in conjunction with the inlet and discharge weirs, permit a varied range of open channel and flow visualisation demonstrations, Adjustable feet permit levelling.

Technical Specifications

Diameter of test pipe:      3.0mm

Length of test pipe:         760mm

Distance between pressure tapping points: 500mm

Range of mercury manometer: 500mm

Range of water manometer:      500mm

Measuring cylinder capacity:    1000ml

Requires Hydraulics Bench Service unit F1-10/F1-10-2

Features & Benefits


  • To visualise flow patterns around immersed objects in an open channel
  • Demonstration of flow phenomena in an open channel
  • Undershot and Overshot weirs
  • Broad Crested and Sharp Crested Weirs
  • Discharge beneath a sluice gate
  • Creation of a hydraulic jump downstream of a sluice gate and weir
  • Drowning of a sluice gate and weir
  • Flow over a broad crested and sharp edged weir
  • Supercritical (fast) and sub-critical (slow) flows over the weir

Length: 0.865m

Width: 0.33m

Height: 0.50m



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