Accession Number : AD0746485

Title :   Turbulent Flow of Drag-Reducing Suspensions

Descriptive Note : Rept. for Oct 1971-Mar 1972

Corporate Author : NAVAL UNDERSEA CENTER SAN DIEGO CA

Personal Author(s) : Hoyt, J W

PDF Url : AD0746485

Report Date : Jul 1972

Pagination or Media Count : 28

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.

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

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE