Drag Reduction in Turbulent Flow of Polymer Solutions.
Final rept. 1 Sep 69-31 Aug 75,
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMICAL ENGINEERING
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Polyelectrolytes as drag reducing agents were studied abnormal effects occurred only in dilute aqueous solutions free of added electrolyte. Extensional flows of polyisobutylene observed by light scattering indicate greater elongation than in shear flow, but work is unfinished. Onset of drag reduction studied with monodisperse poly cis isoprene solutions indicate time based hypothesis gives better correlation than length based hypothesis and that there may be two different onset levels.
- Physical Chemistry