EFFECT OF WAVY ROUGHNESS ON WALL TURBULENCE DAMPING

The effect of ship hull roughness on the wall friction has been one of the most important problems in ship hydrodynamics. One way of physically modeling a pointed hull may be to assume it to be a sinusoidally wavy wall fixed in space. On this basis, this study aims to clarify the effect of the wavy wall on the wall friction by investigating what is happening in the viscous sublayer of the turbulent boundary layer along the wavy wall. Oseen's approximation is applied to the unsteady turbulent flow in the vicinity of the wall and a van Driest-type turbulence damping model is employed for the eddy viscosity near the wall. An analytical solution is thereby obtained as a modification of the eddy viscosity model for the case of a wavy wall.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03899101
• Supplemental Notes:
  • Journal article
• Authors:
  • Himeno, Y
  • Noudo, H
• Publication Date: 1988-6

Media Info

• Features: References;
• Pagination: 10 p.
• Serial:
  • Journal of the Kansai Society of Naval Architects
  • Issue Number: No.209
  • ISSN: 0389-9101

Subject/Index Terms

• TRT Terms: Boundary layer; Damping (Physics); Eddies; Friction; Hulls; Roughness; Turbulence; Turbulent boundary layer; Viscosity
• Old TRIS Terms: Hull roughness; Ship hydrodynamics
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00656176
• Record Type: Publication
• Source Agency: Maritime Technical Information Facility
• Files: TRIS
• Created Date: Jul 21 1994 12:00AM