Wave-current interaction at an angle 2: Theory

Pradeep C. Fernando, Pengzhi Lin, Junke Guo

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

A theoretical model is presented to describe the current velocity within and outside a wave-current boundary layer and to quantify the associated bed shear stresses for wave-current interaction at an arbitrary angle. The model assumes that the wave-induced bed shear stress in the combined flow varies sinusoidally with time while the current-induced bed shear stress follows an eddy viscosity concept. The computational procedure is given for both depth-averaged and reference-point current-based computations. Unlike other analytical models proposing different coefficients for different problems, the present model uses the same set of equations and coefficients to describe wave-current flows at any angle under any flow regime. This model agrees better with both field measurements and laboratory data than existing theoretical models. The model indicates that the wave-current interaction angle is not significant for wave-current flow properties.

Original languageEnglish (US)
Pages (from-to)437-449
Number of pages13
JournalJournal of Hydraulic Research
Volume49
Issue number4
DOIs
StatePublished - Aug 1 2011

Keywords

  • Bed roughness
  • bed shear stress
  • theoretical model
  • velocity distribution
  • wave-current interaction

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology

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