Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4639368 | Journal of Computational and Applied Mathematics | 2013 | 9 Pages |
Abstract
Wave breaking is mainly a three-dimensional flow problem characterized by wave energy dissipation due to turbulence. The understanding of the wave breaking mechanism on a beach is essential in studying coastal processes. The complexity of the wave-induced turbulence flow is also increased by the presence of a two-phase flow, which introduces buoyancy effects. In this work a set of numerical experiments is carried out on wave breaking on a gravel slope. The influence of a one-phase and two-phase flow and the permeability effect of the beach are investigated numerically by means of a Navier-Stokes model known as IH-3VOF, which considers the volume-averaged Reynolds-averaged Navier-Stokes (VARANS) equations (del Jesus, 2011 [3]) to characterize the flow within the porous media. The accuracy of the VARANS equations is demonstrated by means of comparisons with laboratory data. The results are found to be within a 2% error in terms of wave height prior to the broken wave, and up to a 10% error after then, and in the order of 0.20Â s in the time domain for the worst case. A further analysis of wave evolution on a permeable beach with alongshore variation of porosity is studied. Three-dimensional wave breaking and post-breaking wave transformations alongshore are analysed according to porosity values.
Related Topics
Physical Sciences and Engineering
Mathematics
Applied Mathematics
Authors
P. Higuera, M. del Jesus, J.L. Lara, I.J. Losada, Y. Guanche, G. Barajas,