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Can Fluid velocity create a vacuum?

Can Fluid velocity create a vacuum?

Can Fluid velocity create a vacuum?

(OP)
I am working on a project for loading of Hot Asphalt into Rail Cars.  Currently the residual asphalt in a 4" loading pipe remains in the pipe.  Between usage the pipe is stored in a hopper which collects the residue.  This hardens and is usually thrown away.  If I keep the asphalt heated, and collect in a larger container, would the flow velocity, past a portal in the main loading pipe, create enough suction to pull the residue from the storage tank.  How would I calculate this?

RE: Can Fluid velocity create a vacuum?

It can be done for example, by using a venturi jet type "pump", but its something I would really not try to do with solidifying asphalt.

If you insist on looking into it, calculate the reduction in pressure inside the smaller diameter part of the venturi using Bernoulli's equation.  Now take the viscosity of your asphalt at its lowest temperature and see if the pressure differential between atmospheric pressure and the inside of the venturi will give you a flowrate in the pipe between the container and the venturi.

http://virtualpipeline.spaces.msn.com

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