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...
Published in: | Ocean Engineering |
---|---|
Main Authors: | , , |
Format: | Text |
Language: | unknown |
Published: |
Elsevier
2016
|
Subjects: | |
Online Access: | https://openresearch.lsbu.ac.uk/item/871qv https://openresearch.lsbu.ac.uk/download/d1fbd743b33ee4eaf36804fc06540f851c65e93c47eccedff0602f3610a93e37/4992636/Response%20of%20sea%20ice%20floes%20in%20regular%20waves%20%28Final%29.docx https://doi.org/10.1016/j.oceaneng.2016.10.045 |
id |
ftlondsouthbanku:oai:openresearch.lsbu.ac.uk:871qv |
---|---|
record_format |
openpolar |
spelling |
ftlondsouthbanku:oai:openresearch.lsbu.ac.uk:871qv 2023-05-15T18:17:59+02:00 Response of small sea ice floes in regular waves: A comparison of numerical and experimental results Bai, W Zhang, T McGovern, D 2016 application/vnd.openxmlformats-officedocument.wordprocessingml.document https://openresearch.lsbu.ac.uk/item/871qv https://openresearch.lsbu.ac.uk/download/d1fbd743b33ee4eaf36804fc06540f851c65e93c47eccedff0602f3610a93e37/4992636/Response%20of%20sea%20ice%20floes%20in%20regular%20waves%20%28Final%29.docx https://doi.org/10.1016/j.oceaneng.2016.10.045 unknown Elsevier https://openresearch.lsbu.ac.uk/download/d1fbd743b33ee4eaf36804fc06540f851c65e93c47eccedff0602f3610a93e37/4992636/Response%20of%20sea%20ice%20floes%20in%20regular%20waves%20%28Final%29.docx https://doi.org/10.1016/j.oceaneng.2016.10.045 Bai, W, Zhang, T and McGovern, D (2016). Response of small sea ice floes in regular waves: A comparison of numerical and experimental results. Ocean Engineering. 129, pp. 495-506. https://doi.org/10.1016/j.oceaneng.2016.10.045 CC BY-NC 4.0 CC-BY-NC 0905 Civil Engineering 0911 Maritime Engineering Civil Engineering journal-article PeerReviewed 2016 ftlondsouthbanku https://doi.org/10.1016/j.oceaneng.2016.10.045 2022-03-16T20:09:08Z 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. Text Sea ice LSBU Research Open (London South Bank University) Ocean Engineering 129 495 506 |
institution |
Open Polar |
collection |
LSBU Research Open (London South Bank University) |
op_collection_id |
ftlondsouthbanku |
language |
unknown |
topic |
0905 Civil Engineering 0911 Maritime Engineering Civil Engineering |
spellingShingle |
0905 Civil Engineering 0911 Maritime Engineering Civil Engineering Bai, W Zhang, T McGovern, D Response of small sea ice floes in regular waves: A comparison of numerical and experimental results |
topic_facet |
0905 Civil Engineering 0911 Maritime Engineering Civil Engineering |
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 |
Text |
author |
Bai, W Zhang, T McGovern, D |
author_facet |
Bai, W Zhang, T McGovern, D |
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 |
Elsevier |
publishDate |
2016 |
url |
https://openresearch.lsbu.ac.uk/item/871qv https://openresearch.lsbu.ac.uk/download/d1fbd743b33ee4eaf36804fc06540f851c65e93c47eccedff0602f3610a93e37/4992636/Response%20of%20sea%20ice%20floes%20in%20regular%20waves%20%28Final%29.docx https://doi.org/10.1016/j.oceaneng.2016.10.045 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
https://openresearch.lsbu.ac.uk/download/d1fbd743b33ee4eaf36804fc06540f851c65e93c47eccedff0602f3610a93e37/4992636/Response%20of%20sea%20ice%20floes%20in%20regular%20waves%20%28Final%29.docx https://doi.org/10.1016/j.oceaneng.2016.10.045 Bai, W, Zhang, T and McGovern, D (2016). Response of small sea ice floes in regular waves: A comparison of numerical and experimental results. Ocean Engineering. 129, pp. 495-506. https://doi.org/10.1016/j.oceaneng.2016.10.045 |
op_rights |
CC BY-NC 4.0 |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1016/j.oceaneng.2016.10.045 |
container_title |
Ocean Engineering |
container_volume |
129 |
container_start_page |
495 |
op_container_end_page |
506 |
_version_ |
1766193837065109504 |