Exchange of Horizontal Momentum in Combined Waves and Current

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by Rolf Deigaard, Dept. of Hydrodynamics and Water Resources (ISVA), Technical University of Denmark, Building 115, DK 2800 Lyngby, Denmark,

Document Type: Proceeding Paper

Part of: Coastal Engineering 2000:

Abstract: The horizontal momentum exchange due to the organised motion in combined waves and current is analysed in an Eulerian framework. The interaction between the waves and a vertically sheared current causes small time-varying velocities due to the time-varying deformation of the current velocity profile by the wave motion. These velocities are — in combination with the wave orbital velocities — of importance for the momentum exchange, and they are included in the analysis. Their significance is illustrated by examples, considering a situation with a steady uniform longshore current.

Subject Headings: Wave velocity | Ocean waves | Ocean currents | Motion (dynamics) | Velocity profile | Shear deformation | Frames |

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