DRAG REDUCTION OF FLAT PLATES WITH SURFACE ROUGHNESS

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)

• Corporate Authors:

  Naval Undersea Research and Development Center

  San Diego, CA  United States 
• Authors:
  • Poreh, M
• Publication Date: 1971-4

Subject/Index Terms

• TRT Terms: Additives; Drag; Polymers; Roughness; Skin friction
• Old TRIS Terms: Drag reduction; Polymer additives
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00019400
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NUC-TP-222
• Files: TRIS
• Created Date: Nov 19 1971 12:00AM