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What are dynamics for sudden water flow stoppage?

What are dynamics for sudden water flow stoppage?

What are dynamics for sudden water flow stoppage?

(OP)
I test swimming pool drains-- sort of.  I block the drain with a foam pad after establishing constant flow gpm. I take data and the pressure/time trace shows an initial sharp drop and then an oscillatory form on top of a decay back towards the pressure of the water head of the tank.  Longer suction pipe lengths have longer periods.  

Does anyone know if this can be modelled as a mass-spring damper system where the mass is the incompressible flow and the spring and damper properties are mainly in the foam?  Would you know a good source of instruction/information?

RE: What are dynamics for sudden water flow stoppage?

sounds like water hammer

TTFN



RE: What are dynamics for sudden water flow stoppage?

You'll find the pipe elasticity is an important factor.

Cheers

Greg Locock

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