Accession Number : AD0690264

Title :   STUDIES IN RHEOLOGY AND HYDRODYNAMICS OF DILUTE POLYMER SOLUTIONS,

Corporate Author : TECHNION - ISRAEL INST OF TECH HAIFA DEPT OF CIVIL ENGINEERING

Personal Author(s) : Poreh,Michael ; Rubin,Hillel ; Elata,Chaim

Report Date : MAR 1969

Pagination or Media Count : 112

Abstract : Five studies are presented in this publication: A comparison between the behaviour of polymer solutions and flow characteristics of linear elastico-viscous fluid models. The study shows that no linear model can predict consistently all the observed non-Newtonian phenomena of polymer solutions; Turbulent flow of dilute polymer solutions through an annulus. Experimental and theoretical results are presented; Measurements of the dynamic response of flowing polymer solutions with a vibrating torsional quartz crystal are presented. The dynamic elastico-viscous response is found to be independent of the flow characteristics and shear rates; Drag reduction in developing boundary layers by injection of polymer solutions. Reduction of local friction coefficients is of the order of 65 percent, however, energy losses in the injection region decrease the total drag reduction efficiency. Effect of the injection concentration and discharge, width of slot and mean stream velocity are found; Drag reduction and degradation tests of several polymer solutions are presented. (Author)

Descriptors :   (*POLYMERS, *RHEOLOGY), (*HYDRODYNAMICS, POLYMERS), REDUCTION, SOLUTIONS(MIXTURES), FLUID FLOW, DYNAMICS, DRAG, BOUNDARY LAYER, DEGRADATION, ADDITIVES, LUBRICANTS, TURBULENCE, CELLULOSE, VINYLPYRROLIDONE, ISRAEL

Subject Categories : Lubricants and Hydraulic Fluids
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE