EVALUATION OF A ROTATING DISK APPARATUS: DRAG OF A DISK ROTATING IN A VISCOUS FLUID

A rotating disk apparatus, designed to attain high shear stresses comparable to those about hulls of full-scale ships is evaluated. Shear stresses were not measured but were inferred from measurements of disk moments. Two disk surfaces were evaluated, hydraulically smooth and sandpaper rough. For the smooth and rough surface disks in air, the experimental moment coefficients were generally greater than the theoretical predictions. Only the smooth surface disk in water gave results lower than predictions. (Modified author abstract)

• Corporate Authors:

  Naval Ship Research and Development Center

  Bethesda, MD  United States  20034
• Authors:
  • Nelka, J J
• Publication Date: 1973-7

Media Info

• Pagination: 47 p.

Subject/Index Terms

• TRT Terms: Air; Drag; Hulls; Hydrodynamics; Mathematical analysis; Rotation; Roughness; Shear stress; Texture; Viscous flow; Water
• Uncontrolled Terms: Model tests; Rotating disks; Ship hulls
• Old TRIS Terms: Disks; Hull shear stress; Model testing; Shear stresses
• Subject Areas: Design; Hydraulics and Hydrology; Marine Transportation;

Filing Info

• Accession Number: 00051052
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NSRDC-3851 Final Rpt
• Files: TRIS
• Created Date: Mar 12 1974 12:00AM