INVESTIGATION OF THE VELOCITY FIELD OVER WAVES USING A WAVE FOLLOWER

The turbulent velocity field over simple propagating waves is investigated by hot-film sensors in a wind and wave facility. Use is made of a wave follower to obtain measurements below the wave crest level. Turbulence measurements are obtained in a wave following frame over the range 1.75 - 25 cm above the instantaneous water level. The measurements are transformed to an Eulerian frame and compared to measurements obtained from fixed probes over a height range 10-50 cm above the mean water level. In the overlap region the transformed wave following results are in reasonable agreement with the fixed probes results. The measurements below the crest level indicate rapid variations in Reynolds stresses and wave induced velocities. The results suggest nonlinear wave induced perturbations close to the water surface and reveal weaknesses in assumptions adopted in recent theoretical models of turbulent shear flows over waves. (Author)

• Corporate Authors:

  University of Florida, Gainesville

  Coastal and Oceanographic Engineering Department, 336 Weil Hall
  Gainesville, FL  United States  32611-6590
• Authors:
  • Shemdin, O H
  • Lai, R J
• Publication Date: 1973-6

Media Info

• Pagination: 124 p.

Subject/Index Terms

• TRT Terms: Air water interfaces; Anemometers; Flow; Rayleigh waves; Reynolds stress; Shear stress; Spectrum analyzers; Stresses; Turbulence; Velocity; Water waves; Waves; Wind; Wind tunnels
• Candidate Terms: Turbulent flow
• Old TRIS Terms: A; Air water interactions; Hot film probes; Phase velocity; Reynolds stresses; Shear stress distribution; Shear stresses; Velocity profiles; Wave induced stresses
• Subject Areas: Design; Hydraulics and Hydrology; Marine Transportation;

Filing Info

• Accession Number: 00051741
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: TR-18 Tech Rpt
• Files: TRIS
• Created Date: Mar 25 1974 12:00AM