Converting losses between different liquids

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Joined: Tue Sep 11, 2012 5:35 pm

Converting losses between different liquids

Post by DanMcC » Tue Sep 11, 2012 6:03 pm

Hello Clever People.

I've conducted tests to determine the pressure drop across a feature using kerosene as the incompressible fluid. I need to to convert the pressure drop I recorded into a pressure drop with ethylene glycol. (We have a kerosene test rig but no glycol test rig.)

The equation I have worked out (assuming turbulent flow) is.

K = [kinematic viscosity of glycol/kinmatic viscosity of kerosene]^.25 x [density of glycol/density of kerosene]

It seems to make sense. Pressure drop increases with kinematic viscosity and density at a particular mass flow rate. I'm asking for confirmation of this equation - it may be that someone else has done something similar themselves.

Thanks in advance!

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