The Break-up of Jet in non-Newtonian Systems
Advancing the chemical engineering fundamentals
Transport Phenomena in Porous/Granular Media (T2-7P)
Keywords: break-up of jet, ring-shaped orifice nozzle, polymer solution
The addition of polymers to a solvent can affect on the breakup of jets. The length of jet is very important parameter for description of dispersion effect. Knowledge of the jet length has practical significance in fire fighting and cleaning of boiler pipes, where the large length of jet is desirable, as well as in combustion engine, where the short length of jet is recommended.
In the paper the experimental analysis directed on the breakup of flexible, semi-rigid and rigid polymers solutions flowing through a ring-shaped orifice nozzle, has been presented. The main elements of the test installation were ring-shaped orifice nozzle; reservoir; pump; measurement units of liquid flow and digital camera. In the experiments the various aqueous solutions of carboxymethylcellulose sodium salt, polyacrylamide and Xantan gum, have been used. The polymer solutions studied were power-law fluids. The observations were carried out for equivalent Reynolds number power-law fluids values changed from 25 to 5900. An analysis of the photos of the jets break-up showed that the length of jets depends on both, liquid flow rate and type of polymer solutions used. High molecular polymers added to a solvent involve the changes in the rheological properties of liquid and the length of break-up LL of jets. For all polymer solutions used the length of jets was a function of nozzle diameter and equivalent Reynolds number for power-law fluids.
See the full pdf manuscript of the abstract.
Presented Monday 17, 13:30 to 15:00, in session Transport Phenomena in Porous/Granular Media (T2-7P).
