Wave runup on a surging vertical cylinder in regular waves |
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| Institution: | 1. Maritime Institute, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore;2. School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore;3. Department of Ocean and Resources Engineering, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI 96822-2303, USA;4. Deepwater Technology Research Centre, Bureau Veritas Marine Singapore, 20 Science Park Road #03-01, Teletech Park, Singapore Science Park II, 117674, Singapore;5. Singapore Innovation and Research Centre, American Bureau of Shipping, 438 Alexandra Road #10-00, Alexandra Point, 119958, Singapore;1. Department of Civil and Environmental Engineering, Norwegian University of Science and Technology, Trondheim, Norway;2. Department of Marine Technology, Norwegian University of Science and Technology, Trondheim, Norway;3. Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Indiana, USA;1. Flanders Hydraulics Research, Antwerp, Belgium;2. Ghent University, Ghent, Belgium;3. Environmental Physics Laboratory, Universidade de Vigo, Ourense, Spain;4. Delft University of Technology, Delft, The Netherlands |
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| Abstract: | The wave runup caused by a vertical cylinder surging in regular waves is studied both experimentally and numerically. The so-called DualSPHysics Smoothed Particle Hydrodynamics (SPH) code is used for the 3-D numerical modelling. A wide range of cylinder sizes and wave conditions is investigated with results comparing favourably between the experimental and SPH model under both fixed and forced-surge conditions. The experimental and SPH results are further used to predict the maximum runup amplification, in particular the ratio of the runup caused by the surging cylinder to that of the fixed, over the phase difference between the incident wave and surge motion. This maximum runup ratio has been analysed for its dependence on factors such as wave steepness, wave scattering and surge amplitude. An empirical equation is proposed for predicting the maximum runup ratio from known incident wave and surge conditions. Comparison with results from linear solvers suggests that the linear solvers under-predict the full nonlinear runup by a factor of 1.3–1.5. |
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| Keywords: | Wave runup Surging cylinder Regular waves SPH Offshore structures |
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