Quick Answer: The Bernoulli Tube Apparatus is a fluid mechanics demonstration unit with a venturi-profile tube fitted with pressure tappings at several points. A bank of piezometer tubes on a mounting board with a scale shows the pressure head at each point at the same time.
Last updated: October 2026
Key Features
Venturi-profile tube with multi-point pressure tappings
Tube in transparent acrylic or borosilicate glass
Multi-tube piezometer bank for simultaneous head readings
Water flowing through the narrowing and widening sections of the tube shows how pressure falls where velocity rises, which is the core idea of Bernoulli’s principle. Students read the piezometer levels at each tapping to plot pressure head along the tube and relate it to the change in cross-section and flow rate.
Frequently Asked Questions
How are pressures read on the Bernoulli Tube Apparatus?
A bank of piezometer tubes connected to the pressure tappings along the venturi-profile tube gives the head at each point at the same time, against the scale on the board.
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