Numerical Modeling of Backfilling Process around Monopiles

Download

index.pdf

Date

2014-06-20

Author

Baykal, Cüneyt
Fuhrman, David R
Jacobsen, Niels G
Fredsoe, Jorgen

Metadata

Show full item record

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

Item Usage Stats

194
views

0
downloads

This study presents a three-dimensional (3D) numerical modeling study on the backfilling process around monopiles. The numerical model utilized in the study is based on that given by Jacobsen (2011). It is composed of two main modules. The first module is the hydrodynamic model where the fluid flow conditions around the structure and near the bed are solved. The second module is the morphologic model where the sediment transport rates over the bed and around the structure are obtained and used in updating bed elevations around the structure. In the numerical model, the hydrodynamic computations are followed by morphologic computations, resulting in updated bed elevations and mesh structure which are again used to update the hydrodynamics for the next time step. In the hydrodynamic model, Reynolds-averaged Navier-Stokes (RANS) equations are solved with a k-ω turbulence closure. The morphologic model comprises five sub-modules, namely bed load, suspended load, sand slide, bed evolution and 3D mesh motion. The model is constructed in OpenFOAM CFD Package. The present model is applied to several problems of backfilling around a monopile by waves only, where the initial scour hole is generated by steady current. The numerical results appear to be in accord with the existing experimental information.

Subject Keywords

Scour, Backfilling, Piles, Sediment transport, Morphology, Turbulence modeling

URI

https://hdl.handle.net/11511/36697

DOI

https://doi.org/10.9753/icce.v34.sediment.22

Collections

Department of Civil Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

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...
Numerical simulation of scour at the rear side of a coastal revetment Şentürk, Barış Ufuk; Guler, Hasan Gokhan; Baykal, Cüneyt (2023-05-01) 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 morphologic...
Nonlinear dynamic modeling of gear-shaft-disk-bearing systems using finite elements and describing functions Maliha, R; Dogruer, CU; Özgüven, Hasan Nevzat (ASME International, 2004-05-01) This study presents a new nonlinear dynamic model for a gear-shaft-disk-bearing system. A nonlinear dynamic model of a spur gear pair is coupled with linear finite element models of shafts carrying them, and with discrete models of bearings and disks. The nonlinear elasticity term resulting from backlash is expressed by a describing function, and a method developed in previous studies to determine multi harmonic responses of nonlinear multi-degree-of-freedom systems is employed for the solution. The excitat...
Numerical investigation of non-homogenous plastic deformation in quenching process Gür, Cemil Hakan (2001-12-01) The aim of the study is to investigate the evolution of internal stresses and non-homogeneous plastic deformation in quenching by numerical simulation. This paper presents the finite element model of quenching of axisymmetric components and the results of various numerical experiments. In the simulation, first the temperature distribution is determined as a function of geometry and time, Then. a model is described to give the volume fractions of phases as a function of time for the corresponding cooling cur...
Performance evaluation of saliency map methods on remotely sensed RGB images Sönmez, Selen; Halıcı, Uğur; Department of Geodetic and Geographical Information Technologies (2016) Predictive applications of human eye visualization so called saliency map computational models become more attractive in image processing studies. Saliency map highlights regions that are distinctive from their surrounding in the images in interest. In this study, various computational models for salient region detection are investigated on remotely sensed images. The computational methods considered are Itti-Koch, Graph-Based Visual Saliency, Saliency Detection by Combining Simple Priors, Frequency-tuned S...

Citation Formats

C. Baykal, D. R. Fuhrman, N. G. Jacobsen, and J. Fredsoe, “Numerical Modeling of Backfilling Process around Monopiles,” 2014, vol. 1, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36697.