Numerical simulation of scour at the rear side of a coastal revetment

Date

2023-05-01

Author

Şentürk, Barış Ufuk
Guler, Hasan Gokhan
Baykal, Cüneyt

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

133
views

0
downloads

This paper presents the results of a numerical modeling study on the scouring of unprotected rear side material of a rubble mound coastal revetment due to the overtopping of solitary-like waves utilizing a coupled hydro-morphodynamic computational fluid dynamics (CFD) model. Three cases having various wave heights are tested with six different turbulence models together with different wall functions. The hydrodynamic results (free-surface elevations, overtopping volumes, and jet thicknesses) and morphological results (scour profile and scour hole properties) are compared with the existing experimental data to evaluate the performances of different turbulence models and wall functions. It is found that the numerical model can predict the hydrodynamic and morphological results with a high level of accuracy when the appropriate turbulence model and wall function are used. The importance of turbulence in the scouring processes and the turbulence modeling approach in hydro-morphodynamic CFD simulations are highlighted.

Subject Keywords

Computational fluid dynamics, Porous media, Revetment, Scour, Turbulence modeling

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85149718031&origin=inward
https://hdl.handle.net/11511/102698

Journal

Ocean Engineering

DOI

https://doi.org/10.1016/j.oceaneng.2023.114092

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Comparison of turbulence model and wall function couplings for simulating scour Şentürk, Barış Ufuk; Baykal, Cüneyt; Department of Civil Engineering (2022-1-19) In this study, the scouring of bed material at the rear side of a rubble mound coastal revetment due to the overtopping of solitary-like waves is numerically studied using a coupled hydrodynamic and morphological computational fluid dynamics model. The major purpose of this thesis study is to investigate the performances of different turbulence model and wall function couplings on the hydrodynamic and morphological results. In the first part of this study, hydrodynamic simulations are performed, and the res...
Mathematical Modeling of Turbulent Flows of Newtonian Fluids in a Concentric Annulus with Pipe Rotation SORGUN, MEHMET; Aydın, İsmail; ÖZBAYOĞLU, Evren; SCHUBERT, J J (2012-03-01) In this study, a mathematical model is proposed to predict flow characteristics of Newtonian fluids inside a concentric horizontal annulus. A numerical solution, including pipe rotation, is developed for calculating frictional head losses in concentric annuli for turbulent flow. Navier-Stokes equations are numerically solved using the finite differences technique to obtain the velocity field. Experiments with water are performed in a concentric annulus with and without pipe rotation. Average fluid velocitie...
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...
3 D time accurate CFD simulations of wind turbine rotor flow fields Tonkal, Ozan Çağrı; Pehlivan, Sercan; Sezer Uzol, Nilay; İşler, Veysi (American Institute of Aeronautics and Astronautics Inc.(AIAA); 2006-01-12) This paper presents the results of three-dimensional and time-accurate Computational Fluid Dynamics (CFD) simulations of the flow field around the National Renewable Energy Laboratory (NREL) Phase VI horizontal axis wind turbine rotor. The 3-D, unsteady, parallel, finite volume flow solver, PUMA2, is used for the simulations. The solutions are obtained using unstructured moving grids rotating with the turbine blades. Three different flow cases with different wind speeds and wind yaw angles are investigated:...
Improving flow structure and natural convection within fin spacings of plate fin heat sinks Özet, Mehmet Erdem; Tarı, İlker; Department of Mechanical Engineering (2015) The main objectives of this thesis are to numerically investigate the previously observed recirculation zones and longitudinal vortices that occur in low fin height plate finned horizontal heat sinks and to improve the flow structures and heat transfer in these zones using various approaches with the help of simulations performed using commercially available CFD software. The approaches used for improvements are replacing the outer most fins with higher ones, introducing gaps on the length of the fins in va...

Citation Formats

B. U. Şentürk, H. G. Guler, and C. Baykal, “Numerical simulation of scour at the rear side of a coastal revetment,” Ocean Engineering, vol. 275, pp. 0–0, 2023, Accessed: 00, 2023. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85149718031&origin=inward.