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Numerical study on drag and lift coefficients of a marine riser at high Reynolds number using COMSOL multiphysics

Flow around a marine riser in water at the drag crisis regime was investigated using numerical modelling. In this regime, the drag coefficient drops off at a certain Reynolds number due to a change from laminar to turbulent flow. The aim is to investigate the capability of turbulence model to predic...

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Main Authors: Ahmad, M. Faizal, Mohd. Haniffah, Mohd. Ridza, Kueh, Ahmad, Kasiman, Erwan Hafizi
Format: Conference or Workshop Item
Language:English
Published: 2020
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.utm.my/id/eprint/92932/1/MohdRidza2020_NumericalStudyOnDragAndLiftCoefficients.pdf
http://eprints.utm.my/id/eprint/92932/
http://dx.doi.org/10.1088/1755-1315/476/1/012075
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spelling my.utm.929322021-11-07T05:55:02Z http://eprints.utm.my/id/eprint/92932/ Numerical study on drag and lift coefficients of a marine riser at high Reynolds number using COMSOL multiphysics Ahmad, M. Faizal Mohd. Haniffah, Mohd. Ridza Kueh, Ahmad Kasiman, Erwan Hafizi TA Engineering (General). Civil engineering (General) Flow around a marine riser in water at the drag crisis regime was investigated using numerical modelling. In this regime, the drag coefficient drops off at a certain Reynolds number due to a change from laminar to turbulent flow. The aim is to investigate the capability of turbulence model to predict drag coefficient through COMSOL Multiphysics, a computational fluid dynamic (CFD) transient solver and compared against existing numerical models and experiment by Maritime Research Institute Netherlands (MARIN). Numerically, drag and lift forces depend on the point of separation from the cylinder in which different turbulence modelling will result in varying separation point and will lead to different vortex formation and the drag force. Reynolds Average Navier-Stokes (RANS) was employed using the k-ϵ and Menter's Shear Stress Transport (SST) turbulence model in two-dimensional CFD simulation. Six Reynolds numbers, similar to the test case, were considered. It can be concluded that the standard k-ϵ turbulence model, can only provide a good approximation at high turbulence regime, which is Reynolds number of 3.15 ° 105 and higher. While, SST turbulence model can provide a good approximation at subcritical regime which before the sudden drop of drag force regimes. 2020 Conference or Workshop Item PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/92932/1/MohdRidza2020_NumericalStudyOnDragAndLiftCoefficients.pdf Ahmad, M. Faizal and Mohd. Haniffah, Mohd. Ridza and Kueh, Ahmad and Kasiman, Erwan Hafizi (2020) Numerical study on drag and lift coefficients of a marine riser at high Reynolds number using COMSOL multiphysics. In: 2nd International Conference on Civil and Environmental Engineering, CENVIRON 2019, 20 - 21 November 2019, Langkawi, Kedah. http://dx.doi.org/10.1088/1755-1315/476/1/012075
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Ahmad, M. Faizal
Mohd. Haniffah, Mohd. Ridza
Kueh, Ahmad
Kasiman, Erwan Hafizi
Numerical study on drag and lift coefficients of a marine riser at high Reynolds number using COMSOL multiphysics
description Flow around a marine riser in water at the drag crisis regime was investigated using numerical modelling. In this regime, the drag coefficient drops off at a certain Reynolds number due to a change from laminar to turbulent flow. The aim is to investigate the capability of turbulence model to predict drag coefficient through COMSOL Multiphysics, a computational fluid dynamic (CFD) transient solver and compared against existing numerical models and experiment by Maritime Research Institute Netherlands (MARIN). Numerically, drag and lift forces depend on the point of separation from the cylinder in which different turbulence modelling will result in varying separation point and will lead to different vortex formation and the drag force. Reynolds Average Navier-Stokes (RANS) was employed using the k-ϵ and Menter's Shear Stress Transport (SST) turbulence model in two-dimensional CFD simulation. Six Reynolds numbers, similar to the test case, were considered. It can be concluded that the standard k-ϵ turbulence model, can only provide a good approximation at high turbulence regime, which is Reynolds number of 3.15 ° 105 and higher. While, SST turbulence model can provide a good approximation at subcritical regime which before the sudden drop of drag force regimes.
format Conference or Workshop Item
author Ahmad, M. Faizal
Mohd. Haniffah, Mohd. Ridza
Kueh, Ahmad
Kasiman, Erwan Hafizi
author_facet Ahmad, M. Faizal
Mohd. Haniffah, Mohd. Ridza
Kueh, Ahmad
Kasiman, Erwan Hafizi
author_sort Ahmad, M. Faizal
title Numerical study on drag and lift coefficients of a marine riser at high Reynolds number using COMSOL multiphysics
title_short Numerical study on drag and lift coefficients of a marine riser at high Reynolds number using COMSOL multiphysics
title_full Numerical study on drag and lift coefficients of a marine riser at high Reynolds number using COMSOL multiphysics
title_fullStr Numerical study on drag and lift coefficients of a marine riser at high Reynolds number using COMSOL multiphysics
title_full_unstemmed Numerical study on drag and lift coefficients of a marine riser at high Reynolds number using COMSOL multiphysics
title_sort numerical study on drag and lift coefficients of a marine riser at high reynolds number using comsol multiphysics
publishDate 2020
url http://eprints.utm.my/id/eprint/92932/1/MohdRidza2020_NumericalStudyOnDragAndLiftCoefficients.pdf
http://eprints.utm.my/id/eprint/92932/
http://dx.doi.org/10.1088/1755-1315/476/1/012075
_version_ 1717093394937806848
score 13.244404

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