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 language | English (US) |
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Pages (from-to) | 437-449 |
Number of pages | 13 |
Journal | Journal of Hydraulic Research |
Volume | 49 |
Issue number | 4 |
DOIs | |
State | Published - 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