Experiments

  • Determination of weir head.
  • Demonstrating characteristics of flow over rectangular and V notch weirs.
  • Determination of volumetric flow rate.
  • Determine coefficient of discharge.
  • Investigation of head against discharge

Specifications

  • Self-sealing weir panels, manufactured from stainless steel
  • Level gauge to determine the weir head
  • Thomson weir with notch at two different angles
  • Rectangular weir with two different notches
  • Portable, corrosion-resistant glass fibre channel for ease of use and long life
  • Includes rectangular and two V-shaped notches for basic experiments
  • Two additional weirs (Cipolletti and Sutro) are included for more advanced experiments
  • Adjustable depth gauge for precise measurementof water level
  • Works with Hydraulic Bench or simply lab water supply for easy installation

The flow over weirs apparatus, designed to fit seamlessly onto the weir tank, effectively demonstrates how weirs function as simple flow regulators. This setup enables students to conduct experiments on the relationship between upstream water levels and weir discharge for
various notch shapes, using standard laboratory supplies or hydraulic bench. They can then compare their findings with theoretical expectations.

The equipment consists of a molded tank with a central channel. One end of the tank is wider, while the other is deeper. Each weir is placed in a sealed groove within the channel section. Constructed from plastic materials and featuring corrosion-resistant finishes, the apparatus is designed to withstand wear over time.
Water is supplied from the hydraulic bench or laboratory to the wider end of the tank. It flows through the channel and over the weir, allowing students to observe the discharge at the deeper end of the tank. An adjustable depth gauge, mounted on a beam across the channel, enables students to measure the free water surface accurately. Water exits the tank back to the hydraulic bench or into the laboratory drain.

The setup includes a basic set of four weirs: two different Vnotch weirs and two rectangular weirs, facilitating a variety
of experiments.

Technical Data

Rectangular Weirs
Dimension: 50x100mm, 25x100mm

Thompson Weirs: Angle: 30o
, 90o

Flume
LxWxH: 510x165x170mm

Measuring Cylinder
Capacity: 5L

Stopwatch

Measuring range: 0~9h 59min 59sec

Requirements
Water: Laboratory main supply and drain
Scope of Delivery
4 weir plates, 1 level gauge, 1 Weir Tank, 1 stopwatch
1 measuring cylinder, 1 instruction manual