Two-phase model for simulating current-induced scour beneath subsea pipelines at different initial elevations
When a subsea pipeline is laid on an uneven seabed, the pipeline can have an initial elevation, potentially compromising its on-bottom stability; scouring due to flow conditions around the pipe can further exacerbate the problem. We assess the capability of the two-phase Eulerian-Eulerian OpenFOAM s...
Published in: | Volume 9: Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics |
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American Society of Mechanical Engineers
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Online Access: | https://doi.org/10.1115/OMAE2018-77245 http://ecite.utas.edu.au/128022 |
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ftunivtasecite:oai:ecite.utas.edu.au:128022 2023-05-15T14:27:10+02:00 Two-phase model for simulating current-induced scour beneath subsea pipelines at different initial elevations Lee, JY McInerney, JBT Hardjanto, FA Chai, S Cossu, R Leong, ZQ Forrest, AL 2018 https://doi.org/10.1115/OMAE2018-77245 http://ecite.utas.edu.au/128022 en eng American Society of Mechanical Engineers http://dx.doi.org/10.1115/OMAE2018-77245 Lee, JY and McInerney, JBT and Hardjanto, FA and Chai, S and Cossu, R and Leong, ZQ and Forrest, AL, Two-phase model for simulating current-induced scour beneath subsea pipelines at different initial elevations, Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2018), 17-22 July 2018, Madrid, Spain, pp. 1-9. (2018) [Refereed Conference Paper] http://ecite.utas.edu.au/128022 Engineering Maritime Engineering Maritime Engineering not elsewhere classified Refereed Conference Paper PeerReviewed 2018 ftunivtasecite https://doi.org/10.1115/OMAE2018-77245 2019-12-13T22:26:13Z When a subsea pipeline is laid on an uneven seabed, the pipeline can have an initial elevation, potentially compromising its on-bottom stability; scouring due to flow conditions around the pipe can further exacerbate the problem. We assess the capability of the two-phase Eulerian-Eulerian OpenFOAM solver, twoPhaseEulerFoam , in terms of predicting the equilibrium scour depth beneath a pipe at different initial elevations under a steady current for the live bed condition. The predictions were found to be in good agreement with published experimental and numerical results; however, similar to a recent study involving another two-phase Eulerian-Eulerian model, the scour time scale was under-predicted. The predicted equilibrium scour depth was seen to decrease with an increase in the initial pipe elevation. The numerical results were also compared to predictions that were made using previous empirical equations. The most comprehensive equation to date showed a good agreement with the present numerical results. We conclude that this open-source solver, twoPhaseEulerFoam , can be used to predict the equilibrium scour depth beneath subsea pipelines, with short computation times and negligible mesh dependency Conference Object Arctic eCite UTAS (University of Tasmania) Volume 9: Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
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English |
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Engineering Maritime Engineering Maritime Engineering not elsewhere classified |
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Engineering Maritime Engineering Maritime Engineering not elsewhere classified Lee, JY McInerney, JBT Hardjanto, FA Chai, S Cossu, R Leong, ZQ Forrest, AL Two-phase model for simulating current-induced scour beneath subsea pipelines at different initial elevations |
topic_facet |
Engineering Maritime Engineering Maritime Engineering not elsewhere classified |
description |
When a subsea pipeline is laid on an uneven seabed, the pipeline can have an initial elevation, potentially compromising its on-bottom stability; scouring due to flow conditions around the pipe can further exacerbate the problem. We assess the capability of the two-phase Eulerian-Eulerian OpenFOAM solver, twoPhaseEulerFoam , in terms of predicting the equilibrium scour depth beneath a pipe at different initial elevations under a steady current for the live bed condition. The predictions were found to be in good agreement with published experimental and numerical results; however, similar to a recent study involving another two-phase Eulerian-Eulerian model, the scour time scale was under-predicted. The predicted equilibrium scour depth was seen to decrease with an increase in the initial pipe elevation. The numerical results were also compared to predictions that were made using previous empirical equations. The most comprehensive equation to date showed a good agreement with the present numerical results. We conclude that this open-source solver, twoPhaseEulerFoam , can be used to predict the equilibrium scour depth beneath subsea pipelines, with short computation times and negligible mesh dependency |
format |
Conference Object |
author |
Lee, JY McInerney, JBT Hardjanto, FA Chai, S Cossu, R Leong, ZQ Forrest, AL |
author_facet |
Lee, JY McInerney, JBT Hardjanto, FA Chai, S Cossu, R Leong, ZQ Forrest, AL |
author_sort |
Lee, JY |
title |
Two-phase model for simulating current-induced scour beneath subsea pipelines at different initial elevations |
title_short |
Two-phase model for simulating current-induced scour beneath subsea pipelines at different initial elevations |
title_full |
Two-phase model for simulating current-induced scour beneath subsea pipelines at different initial elevations |
title_fullStr |
Two-phase model for simulating current-induced scour beneath subsea pipelines at different initial elevations |
title_full_unstemmed |
Two-phase model for simulating current-induced scour beneath subsea pipelines at different initial elevations |
title_sort |
two-phase model for simulating current-induced scour beneath subsea pipelines at different initial elevations |
publisher |
American Society of Mechanical Engineers |
publishDate |
2018 |
url |
https://doi.org/10.1115/OMAE2018-77245 http://ecite.utas.edu.au/128022 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
http://dx.doi.org/10.1115/OMAE2018-77245 Lee, JY and McInerney, JBT and Hardjanto, FA and Chai, S and Cossu, R and Leong, ZQ and Forrest, AL, Two-phase model for simulating current-induced scour beneath subsea pipelines at different initial elevations, Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2018), 17-22 July 2018, Madrid, Spain, pp. 1-9. (2018) [Refereed Conference Paper] http://ecite.utas.edu.au/128022 |
op_doi |
https://doi.org/10.1115/OMAE2018-77245 |
container_title |
Volume 9: Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics |
_version_ |
1766300785105174528 |