A platform for research: civil engineering, architecture and urbanism
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Non-Linear Wave Current Interactions
Abstract This paper considers the description of a two dimensional wave train propagating on an arbitrary current. The bi-linear numerical model, first proposed by Dalrymple (1974), has been extended to incorporate a five layered description of the flow field. This model allows an accurate representation of a strongly sheared current, and at the same time minimises the discontinuity in the vorticity profile. A variety of wave-current combinations are investigated, and it is shown that the time-averaged vorticity profile is an important parameter in determining the non-linearity of the wave form. In particular, the presence of a strongly sheared current at the water surface is shown to produce a significant increase in both the crest elevation and the wave induced velocity field. These changes cannot be predicted by a simple Doppler shifted solution based on an “equivalent” uniform current.
Non-Linear Wave Current Interactions
Abstract This paper considers the description of a two dimensional wave train propagating on an arbitrary current. The bi-linear numerical model, first proposed by Dalrymple (1974), has been extended to incorporate a five layered description of the flow field. This model allows an accurate representation of a strongly sheared current, and at the same time minimises the discontinuity in the vorticity profile. A variety of wave-current combinations are investigated, and it is shown that the time-averaged vorticity profile is an important parameter in determining the non-linearity of the wave form. In particular, the presence of a strongly sheared current at the water surface is shown to produce a significant increase in both the crest elevation and the wave induced velocity field. These changes cannot be predicted by a simple Doppler shifted solution based on an “equivalent” uniform current.
Non-Linear Wave Current Interactions
Cummins, I. (author) / Swan, C. (author)
1993-01-01
17 pages
Article/Chapter (Book)
Electronic Resource
English
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