Accession Number : AD0746485

Title :   Turbulent Flow of Drag-Reducing Suspensions.

Descriptive Note : Rept. for Oct 71-Mar 72,

Corporate Author : NAVAL UNDERSEA CENTER SAN DIEGO CALIF

Personal Author(s) : Hoyt,J. W.

Report Date : JUL 1972

Pagination or Media Count : 29

Abstract : The friction-reducing properties of fiber suspensions were investigated. Fibers of asbestos, glass, and acrylic were found to greatly reduce the turbulent-flow resistance of both aqueous and non-aqueous suspending fluids. Pipe-flow and rotating-disk experiments show that fibers having the smallest diameter, and substantial length-to-diameter ratio gave the most friction reduction at the smallest weight concentration of fiber. An asbestos fiber gave 65 percent friction reduction in a small pipe-flow apparatus and 48 percent in the rotating-disk equipment (both being the maximum obtainable in the devices) at a suspension concentration of 500 ppm. (Author)

Descriptors :   (*SKIN FRICTION, REDUCTION), (*PIPES, FLUID FLOW), TURBULENCE, FIBERS, SOLUTIONS(MIXTURES), GLASS TEXTILES, ASBESTOS, ACRYLIC RESINS, FRICTION, VISCOSITY

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE