Numerical calculation of backfilling of scour holes

Date

2014-12-04

Author

Sumer, B Mutlu
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

254
views

0
downloads

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 continuity (Exner) equation. The present simulations have utilized continuous morphologic updating in time, both the hydrodynamic and morphologic solutions being advanced with the same time increment. In this way, the simulations illustrate the ability to simulate fully-coupled hydrodynamic and morphologic developments based on continuous feedback. The model has been implemented for two kinds of structures: piles, and pipelines. Initial scour holes are generated by the same model. The numerical results appear to be in accord with the existing experimental information.

Subject Keywords

Calculation, Hydrodynamics, Pile, Scour, Seafloor, Sediment, Sediment transport, Simulation, Suspended load, Turbulence

URI

https://hdl.handle.net/11511/46092

DOI

https://doi.org/10.1201/b17703-83

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...
Stochastic modelling of biochemical networks and inference of modelparameters Purutçuoğlu Gazi, Vilda (null, Springer, 2018-01-01) There are many approaches to model the biochemical systems deterministically or stochastically. In deterministic approaches, we aim to describe the steady-state behaviours of the system, whereas, under stochastic models, we present the random nature of the system, for instance, during transcription or translation processes. Here, we represent the stochastic modelling approaches of biological networks and explain in details the inference of the model parameters within the Bayesian framework.
Parallel solution of soil-structure interaction problems on pc clusters Bahçecioğlu, Tunç; Çetin, Kemal Önder; Department of Civil Engineering (2011) Numerical assessment of soil structure interaction problems require heavy computational efforts because of the dynamic and iterative (nonlinear) nature of the problems. Furthermore, modeling soil-structure interaction may require ﬁner meshes in order to get reliable results. Latest computing technologies must be utilized to achieve results in reasonable run times. This study focuses on development and implantation of a parallel dynamic ﬁnite element analysis method for numerical solution of soil-structure i...
Nonlinear flutter calculations using finite elements in a direct Eulerian-Lagrangian formulation Seber, Guclu; Bendiksen, Oddvar O. (American Institute of Aeronautics and Astronautics (AIAA), 2008-06-01) A fully nonlinear aeroelastic formulation of the direct Eulerian-Lagrangian computational scheme is presented in which both structural and aerodynamic nonlinearities are treated without approximations. The method is direct in the sense that the calculations are done at the finite element level, both in the fluid and structural domains, and the fluid-structure system is time-marched as a single dynamic system using a multistage Runge-Kutta scheme. The exact nonlinear boundary condition at the fluid-structure...
Shape models based on elliptic PDES, associated energies, and their applications in 2D and 3D Gençtav, Aslı; Tarı, Zehra Sibel; Can, Tolga; Department of Computer Engineering (2018) By using an elliptic PDE or its modifications, we develop implicit shape representations and demonstrate their two- and three-dimensional applications. In the first part of the thesis, we present a novel shape characterization field that provides a local measure of roundness at each shape point. The field is computed by comparing the solution of the elliptic PDE on the shape domain and the solution of the same PDE on the reference disk. We demonstrate its potential via illustrative applications including gl...

Citation Formats

B. M. Sumer, C. Baykal, D. R. Fuhrman, N. G. Jacobsen, and J. Fredsoe, “Numerical calculation of backfilling of scour holes,” 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46092.