Hydrodynamics around a jacket-type foundation structure in steady current: A combined experimental and numerical study

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Ramish Satari
  • Barnapratim Sarma
  • Alexander Schendel
  • Mario Welzel
  • Rahul Krishna
  • Torsten Schlurmann
  • Insa Neuweiler
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Details

Original languageEnglish
Article number117832
Number of pages20
JournalOcean engineering
Volume304
Early online date15 Apr 2024
Publication statusPublished - 15 Jul 2024

Abstract

This study investigates the flow characteristics around a complex jacket-type foundation structure when subjected to steady current. The investigation is conducted through physical experiments and numerical simulations. A fully three-dimensional OpenFOAM model is implemented, solving the Unsteady Reynolds-averaged Navier–Stokes equations. In addition, physical experiments were carried out using Particle Image Velocimetry techniques to measure flow velocities around a joint element of the same jacket-type structure. High-resolution measurements were taken in several cross-sectional planes. The findings demonstrate a complex location-dependent flow pattern. Over the height of the jacket, the acceleration of flow and the vortex systems alter as the jacket narrows and distances between structural element change. Flow variations at different cross-sections along the jacket highlight the complex influence of specific jacket elements on the flow behavior. The inclination of piles, along with their varying diameters and arrangements, has a significant impact on the flow field. This makes the direct application of knowledge on the hydrodynamics around pile groups challenging. The geometry of the structure leads to an asymmetrical distribution of maximum shear stress amplification around the main piles, which influences scour depth expectations.

Keywords

    Complex structures, Hydrodynamics, Offshore wind energy, Particle image velocimetry (PIV), Pile groups, RANS, Turbulence modeling

ASJC Scopus subject areas

Cite this

Hydrodynamics around a jacket-type foundation structure in steady current: A combined experimental and numerical study. / Satari, Ramish; Sarma, Barnapratim; Schendel, Alexander et al.
In: Ocean engineering, Vol. 304, 117832, 15.07.2024.

Research output: Contribution to journalArticleResearchpeer review

Satari R, Sarma B, Schendel A, Welzel M, Krishna R, Schlurmann T et al. Hydrodynamics around a jacket-type foundation structure in steady current: A combined experimental and numerical study. Ocean engineering. 2024 Jul 15;304:117832. Epub 2024 Apr 15. doi: 10.1016/j.oceaneng.2024.117832
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title = "Hydrodynamics around a jacket-type foundation structure in steady current: A combined experimental and numerical study",
abstract = "This study investigates the flow characteristics around a complex jacket-type foundation structure when subjected to steady current. The investigation is conducted through physical experiments and numerical simulations. A fully three-dimensional OpenFOAM model is implemented, solving the Unsteady Reynolds-averaged Navier–Stokes equations. In addition, physical experiments were carried out using Particle Image Velocimetry techniques to measure flow velocities around a joint element of the same jacket-type structure. High-resolution measurements were taken in several cross-sectional planes. The findings demonstrate a complex location-dependent flow pattern. Over the height of the jacket, the acceleration of flow and the vortex systems alter as the jacket narrows and distances between structural element change. Flow variations at different cross-sections along the jacket highlight the complex influence of specific jacket elements on the flow behavior. The inclination of piles, along with their varying diameters and arrangements, has a significant impact on the flow field. This makes the direct application of knowledge on the hydrodynamics around pile groups challenging. The geometry of the structure leads to an asymmetrical distribution of maximum shear stress amplification around the main piles, which influences scour depth expectations.",
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note = "Funding Information: This study has been carried out within the Collaborative Research Center (CRC) 1463 “Integrated design and operation methodology for offshore megastructures” and is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - SFB 1463 - 434502799. Alexander Schendel gratefully acknowledges the support of the German Federal Ministry for Economic Affairs and Energy within the funded project “marTech” (BMWi: 0324196A-B)",
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AU - Satari, Ramish

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AU - Schendel, Alexander

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N2 - This study investigates the flow characteristics around a complex jacket-type foundation structure when subjected to steady current. The investigation is conducted through physical experiments and numerical simulations. A fully three-dimensional OpenFOAM model is implemented, solving the Unsteady Reynolds-averaged Navier–Stokes equations. In addition, physical experiments were carried out using Particle Image Velocimetry techniques to measure flow velocities around a joint element of the same jacket-type structure. High-resolution measurements were taken in several cross-sectional planes. The findings demonstrate a complex location-dependent flow pattern. Over the height of the jacket, the acceleration of flow and the vortex systems alter as the jacket narrows and distances between structural element change. Flow variations at different cross-sections along the jacket highlight the complex influence of specific jacket elements on the flow behavior. The inclination of piles, along with their varying diameters and arrangements, has a significant impact on the flow field. This makes the direct application of knowledge on the hydrodynamics around pile groups challenging. The geometry of the structure leads to an asymmetrical distribution of maximum shear stress amplification around the main piles, which influences scour depth expectations.

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