criteria to velocity in vertical gravity piping for solids falling by

[jmelendezc]

what is the criteria to velocity in vertical gravity piping for solids falling by gravity?.
(Solids are polyetilene pellets)


This criteria to velocity helpme to justificate a change of diameter in a existing piping.

Thanks for your help

 

[Cockroach]

How about the change in potential energy, regardless of a body "point mass" or fluid (i.e. Torrechelli Principle)?

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada