MOVABLE BED ROUGHNESS AND CURRENT PROFILES IN THE PRESENCE OF IRREGULAR WAVES WITH AN ARBITRARY ANGLE TO CURRENTS

The bed roughness ks and current velocity profiles in the presence of waves with an arbitrary angle to currents are studied. It is found that the movable bed roughness is affected by both the wave and the current and only slightly by the angle between the wave propagation and the current, and that existing formulae derived in purely oscillatory flows generally fail to predict ks. In this study, a new formula which takes account of the effect of the wave and the current on the bed roughness is suggested to calculate ks in combined wave-current flows. With this formula, the current profiles calculated by You's model agree satisfactorily with the laboratory data of van Kampen, Nap and Havinga, and the field measurements of Grant, Williams, Drake et al.

• Supplemental Notes:
  • Ocean Engng, v 23 n 3, Apr 1996, p 225 [18 p, 30 ref, 1 tab, 12 fig]
• Authors:
  • You
  • Z-J
• Publication Date: 1996

Language

• English

Subject/Index Terms

• TRT Terms: Ocean bottom; Roughness; Velocity; Waves
• Old TRIS Terms: Currents; Irregular waves; Velocity distribution
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00727966
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Nov 4 1996 12:00AM