Response of small sea ice floes in regular waves: A comparison of numerical and experimental results
In severe seas ice floes can gain significant kinetic energy presenting a hazard to offshore structures and shipping. A numerical investigation is presented to investigate the kinematic response of sea ice floes in waves. The results are compared against available experimental data. The surge, heave...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:1529762 2023-12-24T10:24:46+01:00 Response of small sea ice floes in regular waves: A comparison of numerical and experimental results Bai, W Zhang, T McGovern, DJ 2017-01-01 text https://discovery.ucl.ac.uk/id/eprint/1529762/1/McGovern_Response%20of%20sea%20ice%20floes%20in%20regular%20waves.pdf https://discovery.ucl.ac.uk/id/eprint/1529762/ eng eng PERGAMON-ELSEVIER SCIENCE LTD https://discovery.ucl.ac.uk/id/eprint/1529762/1/McGovern_Response%20of%20sea%20ice%20floes%20in%20regular%20waves.pdf https://discovery.ucl.ac.uk/id/eprint/1529762/ open Ocean Engineering , 129 pp. 495-506. (2017) Science & Technology Technology Physical Sciences Engineering Marine Civil Ocean Oceanography Ice floe Dynamic response Linear analysis Computational fluid dynamics Experimental study FLOATING ELASTIC DISCS OCEAN WAVES HYDROELASTIC RESPONSE OPENFOAM(R) MOTION GENERATION ICEBERGS Article 2017 ftucl 2023-11-27T13:07:37Z In severe seas ice floes can gain significant kinetic energy presenting a hazard to offshore structures and shipping. A numerical investigation is presented to investigate the kinematic response of sea ice floes in waves. The results are compared against available experimental data. The surge, heave and drift velocity are analyzed for various different ice floe shapes using the potential flow model HydroSTAR® and the viscous flow CFD model OpenFOAM®. The results show relative wavelength (λ normalized with floe length Lc) λ/Lc strongly influences heave and surge, with a heave resonance occurring at λ/Lc=8 for the cubic floe not being correspondingly observed for the square floe. The heave Response Amplitude Operator (RAO) is found to increase with floe thickness with a resonance occurring when relative thickness b/Lc≥0.5. Shape is observed to be less important than thickness. At small values of λ/Lc the floe is observed to move forward over the whole wavelength resulting in its drift displacement. Both vertical velocity relative to theoretical particle velocity Vy/Vp and ratio of forward and backward velocities show resonance at λ/Lc=8. Comparing with experimental data, the linear analysis using HydroSTAR® overestimates the heave and surge RAOs. OpenFOAM®, however, appears to provide a much better agreement with the experimental data indicating viscosity plays an important role in floe kinematics. Article in Journal/Newspaper Sea ice University College London: UCL Discovery |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
Science & Technology Technology Physical Sciences Engineering Marine Civil Ocean Oceanography Ice floe Dynamic response Linear analysis Computational fluid dynamics Experimental study FLOATING ELASTIC DISCS OCEAN WAVES HYDROELASTIC RESPONSE OPENFOAM(R) MOTION GENERATION ICEBERGS |
spellingShingle |
Science & Technology Technology Physical Sciences Engineering Marine Civil Ocean Oceanography Ice floe Dynamic response Linear analysis Computational fluid dynamics Experimental study FLOATING ELASTIC DISCS OCEAN WAVES HYDROELASTIC RESPONSE OPENFOAM(R) MOTION GENERATION ICEBERGS Bai, W Zhang, T McGovern, DJ Response of small sea ice floes in regular waves: A comparison of numerical and experimental results |
topic_facet |
Science & Technology Technology Physical Sciences Engineering Marine Civil Ocean Oceanography Ice floe Dynamic response Linear analysis Computational fluid dynamics Experimental study FLOATING ELASTIC DISCS OCEAN WAVES HYDROELASTIC RESPONSE OPENFOAM(R) MOTION GENERATION ICEBERGS |
description |
In severe seas ice floes can gain significant kinetic energy presenting a hazard to offshore structures and shipping. A numerical investigation is presented to investigate the kinematic response of sea ice floes in waves. The results are compared against available experimental data. The surge, heave and drift velocity are analyzed for various different ice floe shapes using the potential flow model HydroSTAR® and the viscous flow CFD model OpenFOAM®. The results show relative wavelength (λ normalized with floe length Lc) λ/Lc strongly influences heave and surge, with a heave resonance occurring at λ/Lc=8 for the cubic floe not being correspondingly observed for the square floe. The heave Response Amplitude Operator (RAO) is found to increase with floe thickness with a resonance occurring when relative thickness b/Lc≥0.5. Shape is observed to be less important than thickness. At small values of λ/Lc the floe is observed to move forward over the whole wavelength resulting in its drift displacement. Both vertical velocity relative to theoretical particle velocity Vy/Vp and ratio of forward and backward velocities show resonance at λ/Lc=8. Comparing with experimental data, the linear analysis using HydroSTAR® overestimates the heave and surge RAOs. OpenFOAM®, however, appears to provide a much better agreement with the experimental data indicating viscosity plays an important role in floe kinematics. |
format |
Article in Journal/Newspaper |
author |
Bai, W Zhang, T McGovern, DJ |
author_facet |
Bai, W Zhang, T McGovern, DJ |
author_sort |
Bai, W |
title |
Response of small sea ice floes in regular waves: A comparison of numerical and experimental results |
title_short |
Response of small sea ice floes in regular waves: A comparison of numerical and experimental results |
title_full |
Response of small sea ice floes in regular waves: A comparison of numerical and experimental results |
title_fullStr |
Response of small sea ice floes in regular waves: A comparison of numerical and experimental results |
title_full_unstemmed |
Response of small sea ice floes in regular waves: A comparison of numerical and experimental results |
title_sort |
response of small sea ice floes in regular waves: a comparison of numerical and experimental results |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2017 |
url |
https://discovery.ucl.ac.uk/id/eprint/1529762/1/McGovern_Response%20of%20sea%20ice%20floes%20in%20regular%20waves.pdf https://discovery.ucl.ac.uk/id/eprint/1529762/ |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Ocean Engineering , 129 pp. 495-506. (2017) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/1529762/1/McGovern_Response%20of%20sea%20ice%20floes%20in%20regular%20waves.pdf https://discovery.ucl.ac.uk/id/eprint/1529762/ |
op_rights |
open |
_version_ |
1786199867011366912 |