In this study, the fully-coupled and fully-dynamic Biot governing equations in the open-source geotechFoam solver are extended to account for pore fluid viscous stresses. Additionally, turbulent pore fluid flow in deformable porous media is modeled by means of the conventional eddy viscosity concept without the need to resolve all turbulence scales. A new approach is presented to account for porous media resistance to flow (solid-to-fluid coupling) by means of an effective viscosity, which accounts for tortuosity, grain shape and local turbulences induced by flow through porous media. The new model is compared to an implemented extended Darcy-Forchheimer model in the Navier-Stokes equations, which accounts for laminar, transitional, turbulent and transient flow regimes. Further, to account for skeleton deformation, the porosity and other model parameters are updated with regard to strain of geomaterials. The presented model is calibrated by means of available results of physical experiments of unidirectional and oscillatory flows.
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ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering
June 17–22, 2018
Madrid, Spain
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5130-2
PROCEEDINGS PAPER
Modelling Turbulent Flow in Deformable Highly Porous Seabed and Structures Available to Purchase
Hisham Elsafti,
Hisham Elsafti
TU Braunschweig, Brunswick, Germany
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Hocine Oumeraci
Hocine Oumeraci
TU Braunschweig, Brunswick, Germany
Search for other works by this author on:
Hisham Elsafti
TU Braunschweig, Brunswick, Germany
Hocine Oumeraci
TU Braunschweig, Brunswick, Germany
Paper No:
OMAE2018-77318, V009T10A028; 16 pages
Published Online:
September 25, 2018
Citation
Elsafti, H, & Oumeraci, H. "Modelling Turbulent Flow in Deformable Highly Porous Seabed and Structures." Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. Volume 9: Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics. Madrid, Spain. June 17–22, 2018. V009T10A028. ASME. https://doi.org/10.1115/OMAE2018-77318
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