Accession Number : AD0722286

Title :   The Mechanisms of the Effect of Dissolved Macromolecules on Turbulent Friction,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Kobets,G. F.

Report Date : 22 DEC 1970

Pagination or Media Count : 21

Abstract : The decrease in the turbulent friction in non-Newtonial liqs. was determined as a function of the physical properties of the dissolved molecules and of the hydrodynamic conditions (particularly Reynolds No.). Data obtained from solutions of synthetic polymers (e.g., CM-cellulose and poly(vinyl alc.)) or bio-polymers (e.g., polysaccharides and fish slime) suggested that a decrease in the turbulent friction was dependent on the rheological constants of the solution and its concentration. The effects of the dissolved macromolecules on the turbulent friction in non-Newtonian liquids was interpreted in terms of an anisotropic viscosity hypothesis. (Author)

Descriptors :   (*TURBULENCE, SKIN FRICTION), (*POLYMERS, ADDITIVES), (*DRAG, REDUCTION), MOLECULAR PROPERTIES, MIXTURES, SOLUTIONS(MIXTURES), USSR

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE