Accession Number : AD0724288

Title :   Drag Reduction of Flat Plates with Surface Roughness,

Corporate Author : NAVAL UNDERSEA RESEARCH AND DEVELOPMENT CENTER SAN DIEGO CALIF

Personal Author(s) : Poreh,Michael

Report Date : APR 1971

Pagination or Media Count : 47

Abstract : The effect on drag reduction of the surface roughness of flat plates was studied. The plates are considered first to be moving in homogeneous polymer solutions and next to be ejecting polymers. It is shown that when the roughness is small relative to the thickness of the viscous sublayer near a smooth surface, the effect of the roughness is also small and can be neglected, whereas larger roughness reduces the effect of the polymers drastically. (Author)

Descriptors :   (*SKIN FRICTION, REDUCTION), (*FLAT PLATE MODELS, SKIN FRICTION), SURFACE ROUGHNESS, POLYMERS, EJECTION, MATHEMATICAL ANALYSIS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE