Affiliation(s)
Department of Civil Engineering and Construction Management,California State University, Northridge, CA 91330, USA
ABSTRACT
Civil Engineering design students at CSUN (California State University,
Northridge), aimed to demonstrate the pneumatic action of liquid water as it
flows through an airtight one-way vessel system which is known as Heron’s
Fountain. This project explores hydraulic and pneumatics principles commonly
found in environment control systems, such as the non-isothermal heating
facilities located on the CSUN campus. Since this was a simply constructed
version of an ancient Greek fountain, its development required the
collaboration of the team to execute its simple function. The parameters involved
were diameter, length, height, and density. This analysis utilizes Pascal and
Bernoulli’s equations to reinforce the principles of fluid mechanics. The
fountain action is described based on flow rate and head loss is described by
Darcy’s equation. Friction loss with an angled fitting attached to the fountain
head is described by Reynold’s equation. The experiment observed the
performances of two types of reentrant tube fittings for head loss: straight and angled.
The experiment enhanced the educational experience of the research team by
bringing together creative ideas from different educational and cultural
backgrounds. The results of the experiment concluded with a 0.58% error for the
straight fitting and 5.3% error for an angled fitting.
KEYWORDS
Heron’s Fountain, hydraulic principles, air pressure, pneumatics,
friction factor, engineering education.
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