Chapter
Dec 31, 2015
Local Scour around Cylindrical Piles Due to Waves and Currents Combined
Publication: Coastal Engineering 1988
Abstract
Local scour depth around a pile due to waves only is small, but under waves and weak currents combined it became large. If the flow velocity increases, the maximum scour depth increases and may approach to that by running water. In the processes of the scouring, Kármán vortex play an important role in deciding characteristics of a scour hole. In the case of the horseshoe vortex predominant, the maximum scour depth is found at the upstream end of a pile, but in the coupled field of waves and currents, the initial scouring position is a little apart from a pile in the offshore side and make an angle of about 45 degree in the shoreward direction. This depends on a vortex shedding from a pile. By using light weight aggregate, the effect of ripples on local scour depth is made clear.
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Published In
Coastal Engineering 1988
Pages: 1310 - 1322
Copyright
© 1989 American Society of Civil Engineers.
History
Published online: Dec 31, 2015
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Yoshiaki Kawata, M.ASCE
Assoc. Prof., Disaster Prevention Research Institute, Kyoto University, Goka-sho, Uji, Kyoto 611, Japan
Yoshito Tsuchiya, M.ASCE
Prof.,DPRI, Kyoto University
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