To smp263899,
Choking,not chocking,in pipelines by pneumatic conveying systems is due to a change in regime,from dilute-phase to densephase.
This has to do with the load ratio µ:kgsolids/kggas.
The slip flow velocity is much higher than the freefall velocity of a singel partical...
Mr.Goldman,
The State diagram will tell you all about dilute and dense fase by pneumaticconveying.If you are interrested, drop me a note to: cvdorst@skynet.be