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