Traction Force Due to Aqueous Foam Flow Rising in a Vertical Pipe
This paper discusses in an experimental way the traction force exerted by a flow of aqueous foam through the annular space between a central rod and the inner walls of the pipe. These studies were made to prove if foam behaves as a granular material or as a power-law fluid. Experiments allow concluding that the flow of dry foam is a type of slipping flow where the traction does not depend on the radius of the pipe or on the radius of the rod.
KeywordsFrictional Force Slip Velocity Traction Force Vertical Pipe Film Rupture
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