Abstract
A theoretical model which describes the motion in combined wave and current boundary layers near fixed rough seabeds is presented. A three-layer time invariant eddy viscosity model is employed to find an analytical solution. Comparisons are made with small and large scale laboratory experiments as well as field measurements, and the model predicts the essential features of the experimental results reasonably well. A graphical representation of the model prediction results is also given, which can be used to derive a defined “velocity load” on a pipeline resting on a sea bottom in a combined wave-current environment.
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