Development of a quasi 2-DH model for numerical modeling of shoreline changes

Özsoy, Can
The scope of this thesis is to develop a quasi-2-dimensional numerical model to numerically modeling shoreline response under wave action in the vicinity of various coastal defense implementation. The developed quasi-2-dimensional model is applicable in both the medium and the long term. The model is utilizing a spectral wave model, which solves the energy balance equation. Longshore sediment transport is solved through the bulk sediment transport formula, and it is distributed over the surf-zone. The aim is to develop an accurate sediment transport model combining a spectral wave model with directly computed sediment transport expressions without prolonging computation time. The model consists of cross-shore and swash zone sand transport for maintaining an equilibrium profile. The developed quasi-2-dimensional numerical model is compared with theoretical cases and validated through Gravens and Wang’s (2007) laboratory experiments. For theoretical cases, beach cusps, model’s scope of cross-shore sediment transport, and a single groin case investigated. Moreover, series of experimental results in an offshore breakwater’s vicinity are compared with the model results for laboratory experiments. In initial cases of laboratory experiments, the model successfully represents both the shoreline and the areal changes. As the shoreline advances through the offshore breakwater and tombolo starts to form, incoming wave and local orientation angles start to increase; the model results deviate from laboratory measurements.


Numerical calculation of backfilling of scour holes
Sumer, B Mutlu; Baykal, Cüneyt; Fuhrman, David R; Jacobsen, Niels G; Fredsoe, Jorgen (2014-12-04)
A fully-coupled hydrodynamic and morphologic CFD model is presented for simulating backfilling processes around structures. The hydrodynamic model is based on Reynolds-averaged Navier-Stokes equations, coupled with two-equation k-ω turbulence closure. The sediment transport model consists of separate bed and suspended load descriptions, the latter based on a turbulent diffusion equation coupled with a reference concentration function near the sea bed boundary. Bed morphology is based on the sediment continu...
Numerical simulation of wave-induced scour and backfilling processes beneath submarine pipelines
Fuhrman, David R; Baykal, Cüneyt; Sumer, B Mutlu; Jacobsen, Niels G; Fredsoe, Jorgen (2014-12-01)
A fully-coupled hydrodynamic/morphodynamic numerical model is presented and utilized for the simulation of wave-induced scour and backfilling processes beneath submarine pipelines. The model is based on solutions to Reynolds-averaged Navier-Stokes equations, coupled with k - omega turbulence closure, with additional bed and suspended load descriptions forming the basis for sea bed morphology. The morphological evolution is updated continuously, rather than being based e.g. on period- or other time-averaging...
Developing an HLA-based naval maneuvering simulation
Topcu, O; Oğuztüzün, Mehmet Halit S. (Wiley, 2005-12-01)
This paper discusses the main issues involved in developing a high level architecture (HLA)-based distributed simulation while presenting an application called Naval Surface Tactical Maneuvering Simulation System (NSTMSS), which is intended to serve as a testbed for HLA and distributed interactive simulation (DIS) research. NSTMSS provides a networked virtual environment (NVE) for naval surface actions in which new formations can be evaluated and tested and present ones can be practiced and analyzed. This p...
Numerical modeling of short term morphological changes around coastal structures and at the river mouths
Demirci, Ebru; Baykal, Cüneyt; Güler, Işıkhan; Department of Civil Engineering (2016)
In this study, XBeach, a two dimensional depth averaged numerical model developed mainly for simulating nearshore hydro- and morphodynamics is applied to two case studies; i) laboratory experiments on short-term morphological changes around a detached breakwater and a T-groin and ii) a fluvial dominated coastal flooding event at the Manavgat river mouth between dates, 4th and 15th December, 1998. In the first part of study, the numerical model is calibrated for the wave, current and bottom evolution conditi...
Development of a tool for prediction of the orbital parameters of earth observation satellites
Altay, Alkan; Karsli, Gizem; Oezkan, Ahmet (2007-06-16)
Development of a tool that predicts the orbital parameters of a satellite from an initial state vector for a specified time interval is addressed. The elements used in the algorithm are presented. The prediction performance of the algorithm is demonstrated by using the two line elements of a GPS satellite and the CHAMP scientific satellite.
Citation Formats
C. Özsoy, “Development of a quasi 2-DH model for numerical modeling of shoreline changes,” M.S. - Master of Science, Middle East Technical University, 2021.