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Wave-Current Bottom Boundary Layer Interactions

Frank, Donya P.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1229087949

Abstract Details

2008, Master of Science, Ohio State University, Civil Engineering.
Wave-current bottom boundary layer interactions over flat and rippled beds areexamined using a quasi-three-dimensional non-hydrostatic numerical model, Dune. Dune solves the Reynolds-Averaged Navier-Stokes (RANS) equations with the k- ! second-order turbulence closure scheme. The model is forced with free stream wave and mean flows approaching the two-dimensional topography at a given angle. Simulations are performed over both flat and rippled beds for a range of wave and current forcing conditions. The resulting non-dimensional mean bed stress, typically used to parameterize energy dissipation in ocean circulation models, as well as, the peak bed stress, used to quantify sediment transport, are assessed. The simulations are then compared with three applied engineering wave-current bottom boundary layer models (Madsen, 1994; Soulsby, 1997; Styles and Glenn, 2000). Dune predicts that an obliquely approaching current does not significantly impact the peak bed stress, but will affect the mean bed stress under large wave forcing. Predictions of the mean and peak bed stresses by Dune and the engineering models are generally of comparable magnitude on a flat bed, with the exception of cases with large wave inertia. However, the engineering models fail to capture the predicted cross-shore variability of the bed stresses at positions along the ripple.
Ethan Kubatko (Advisor)
Diane Foster (Advisor)
Harold Walker (Committee Member)
165 p.
Civil Engineering; Ocean Engineering
waves-current bottom boundary layer; bed stress

Recommended Citations

Citations

  • Frank, D. P. (2008). Wave-Current Bottom Boundary Layer Interactions [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1229087949

    APA Style (7th edition)

  • Frank, Donya. Wave-Current Bottom Boundary Layer Interactions. 2008. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1229087949.

    MLA Style (8th edition)

  • Frank, Donya. "Wave-Current Bottom Boundary Layer Interactions." Master's thesis, Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1229087949

    Chicago Manual of Style (17th edition)

osu1229087949
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© 2008, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.