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HM 164 Flume for Open and Closed Flow
Education / GUNT Hamburg / Fluid Mechanics and Hydrology / Fundamentals of Fluid Mechanics /


 The HM 164 enables experiments to be performed on open and closed flumes. In the open flume the flow processes at various weir structures can be investigated. By means of straightforward reconfiguration, it is possible to create a closed flume. In this way basic experiments on pipe flow or on flow processes in a culvert can also be made on the unit. The integrated, height adjustable ramp can be used for both flumes: in the open channel it is used as a further underwater weir, while in the closed flume it causes a change in the flow cross-section and thus facilitates the investigation of different flow conditions. In this way a large range of experiments can be performed with a unit of straightforward design.

Learning Objectives / Experiments
Open flume:
· Flow over weir structures
· Flow over a wide crested weir (sharp or rounded)
· Flow over a narrow crested weir
· Flow underneath an undershoot weir
· Transition from subcritical flow to supercritical flow (”hydraulic jump”)
· Supercritical / subcritical flow

Closed flume:
· Measurements of static pressure and total pressure in a pipe flow (closed flume with full flow)
· Flow through a closed flume with constant cross-section
· Flow through a closed flume with changing cross-section
[1] Channel for open and closed flume
[2] lxwxh: 1585x750x1500mm, 100kg
[3] Channel made of transparent plastic with height adjustable bed (ramp)
[4] Experimental section lxwxh: 1100x40x300mm
[5] Measurement of the dynamic and static pressure via measuring tubes
[6] Speed measurement via dynamic pressure
[7] Weir models: sharp-edged and rounded underwater weir, weir with narrow crest, overshoot weir with "ski jump"
[8] 230V, ~50Hz
Technical Data
Pump 550W, 2750rpm:
Max. pump capacity: 230ltr/min
Max. head: 12m
Supply tank: 180ltr.
Dimensions and Weight
lxwxh : 1585 x 750 x 1600 mm
Weight empty : approx. 150 kg
Required for Operation
230V, ~50Hz
Scope of Delivery
1 flume, complete, 1 model holder, 3 additional weir models, 1 instruction manual
Order Details
070.16400 HM 164 Flume for Open and Closed Flow