Fluidization of investment cast sand

Your fluid velocity must be higher than the settling velocity of the sand grains. Please refer to the following website for details on Stokes' Law 7 for more information on the settling velocity of the sand.

http://en.wikipedia.org/wiki/Stokes%27_law

Hi

If you want to apply some equation[Bernoulli or continuity ] to prevent the sand settling,you have to take a lot of experimental factors,like: kind of piping, piping engineering, friction factors.

I think the principle is to have the correct velocity in order to prevent the gravity acts on the sand particle{to increment the mass flow MASS FLOW=AREA[VELOCITY][DENSITY] }so may be is better to do some experiments.

Your sand flow=5000 lbs./hr, did you know the pump capacity HP.?

Do you know the ID in your pipes?

Kind of pipe?

What kind of pump is? Centrifugal,progressive cavity,Pneumatic pump,peristaltic pump,magnetic stroke?

Israel Barron

Steel Fab

ibarron@sfmex.com