Accession Number : AD0714021

Title :   Boundary Layer Over Uniform Roughness.

Descriptive Note : Technical rept.,

Corporate Author : HYDRONAUTICS INC LAUREL MD

Personal Author(s) : Wu,Jin

Report Date : OCT 1970

Pagination or Media Count : 31

Abstract : The boundary-layer survey is conducted of a rough plate consisting of uniform spherical particles arranged in a random and in highly compact fashion. Strong turbulent mixing is observed in a region within a quarter of the particle size from the top of the particle. The datum of the normal axis of this rough surface is found to be located at a distance of 1/50 of the particle diameter below the top of the particle. Based on these findings, problems such as roughness criterion in aeolian sand tranport, Karman constant in suspension streams, entrainment of grains from sand bed, and dilution of mass ejection from the wall are discussed. (Author)

Descriptors :   (*BOUNDARY LAYER, SURFACE ROUGHNESS), PARTICLES, SPHERES, SAND, MASS TRANSFER, WALLS, SEDIMENTATION

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE