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Numerical Simulation of the Vortex-Induced Vibration of A Curved Flexible Riser in Shear Flow
A series of fully three-dimensional (3D) numerical simulations of flow past a free-to-oscillate curved flexible riser in shear flow were conducted at Reynolds number of 185–1015. The numerical results obtained by the two-way fluid–structure interaction (FSI) simulations are in good agreement with th...
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Published in: | China ocean engineering 2018-06, Vol.32 (3), p.301-311 |
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description | A series of fully three-dimensional (3D) numerical simulations of flow past a free-to-oscillate curved flexible riser in shear flow were conducted at Reynolds number of 185–1015. The numerical results obtained by the two-way fluid–structure interaction (FSI) simulations are in good agreement with the experimental results reported in the earlier study. It is further found that the frequency transition is out of phase not only in the inline (IL) and crossflow (CF) directions but also along the span direction. The mode competition leads to the non-zero nodes of the rootmean- square (RMS) amplitude and the relatively chaotic trajectories. The fluid–structure interaction is to some extent reflected by the transverse velocity of the ambient fluid, which reaches the maximum value when the riser reaches the equilibrium position. Moreover, the local maximum transverse velocities occur at the peak CF amplitudes, and the values are relatively large when the vibration is in the resonance regions. The 3D vortex columns are shed nearly parallel to the axis of the curved flexible riser. As the local Reynolds number increases from 0 at the bottom of the riser to the maximum value at the top, the wake undergoes a transition from a two-dimensional structure to a 3D one. More irregular small-scale vortices appeared at the wake region of the riser, undergoing large amplitude responses. |
doi_str_mv | 10.1007/s13344-018-0031-z |
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The numerical results obtained by the two-way fluid–structure interaction (FSI) simulations are in good agreement with the experimental results reported in the earlier study. It is further found that the frequency transition is out of phase not only in the inline (IL) and crossflow (CF) directions but also along the span direction. The mode competition leads to the non-zero nodes of the rootmean- square (RMS) amplitude and the relatively chaotic trajectories. The fluid–structure interaction is to some extent reflected by the transverse velocity of the ambient fluid, which reaches the maximum value when the riser reaches the equilibrium position. Moreover, the local maximum transverse velocities occur at the peak CF amplitudes, and the values are relatively large when the vibration is in the resonance regions. The 3D vortex columns are shed nearly parallel to the axis of the curved flexible riser. As the local Reynolds number increases from 0 at the bottom of the riser to the maximum value at the top, the wake undergoes a transition from a two-dimensional structure to a 3D one. 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The numerical results obtained by the two-way fluid–structure interaction (FSI) simulations are in good agreement with the experimental results reported in the earlier study. It is further found that the frequency transition is out of phase not only in the inline (IL) and crossflow (CF) directions but also along the span direction. The mode competition leads to the non-zero nodes of the rootmean- square (RMS) amplitude and the relatively chaotic trajectories. The fluid–structure interaction is to some extent reflected by the transverse velocity of the ambient fluid, which reaches the maximum value when the riser reaches the equilibrium position. Moreover, the local maximum transverse velocities occur at the peak CF amplitudes, and the values are relatively large when the vibration is in the resonance regions. The 3D vortex columns are shed nearly parallel to the axis of the curved flexible riser. As the local Reynolds number increases from 0 at the bottom of the riser to the maximum value at the top, the wake undergoes a transition from a two-dimensional structure to a 3D one. More irregular small-scale vortices appeared at the wake region of the riser, undergoing large amplitude responses.</description><subject>Amplitude</subject><subject>Coastal Sciences</subject><subject>Columns (structural)</subject><subject>Computational fluid dynamics</subject><subject>Computer simulation</subject><subject>Engineering</subject><subject>Fluid flow</subject><subject>Fluid- and Aerodynamics</subject><subject>Marine & Freshwater Sciences</subject><subject>Numerical and Computational Physics</subject><subject>Oceanography</subject><subject>Offshore Engineering</subject><subject>Phase transitions</subject><subject>Reynolds number</subject><subject>Shear flow</subject><subject>Simulation</subject><subject>Three dimensional flow</subject><subject>Vibration</subject><issn>0890-5487</issn><issn>2191-8945</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp1kE1LAzEQhoMoWKs_wFvAk4fozCb7dSzFj0JRsNqbhGw2abdsd2uyq7a_3q0revI0MPO878BDyDnCFQLE1x45F4IBJgyAI9sdkEGAKbIkFeEhGUCSAgtFEh-TE-9XACGGAgfk9aFdG1doVdJZsW5L1RR1RWtLm6Wh89o15pNNqrzVJqfzInO_9xEdt-69296W5rPISkOfCm8cLSo6Wxrlun39cUqOrCq9OfuZQ_Jye_M8vmfTx7vJeDRlmqe8YcLmSZQoE4Ym0JDZLI61Rp1HIVrOY8Vjk9tcWB2kHHOtgOdJkEWgMxCRFgkfksu-90NVVlULuapbV3Uf5W6x3C60NEFnBjhA1LEXPbtx9VtrfPMHByBSxBC_Kewp7WrvnbFy44q1cluJIPfGZW9cdr1yb1zuukzQZ3zHVgvj_pr_D30BwqKDyQ</recordid><startdate>20180601</startdate><enddate>20180601</enddate><creator>Zhu, Hong-jun</creator><creator>Lin, Peng-zhi</creator><general>Chinese Ocean Engineering Society</general><general>Springer Nature B.V</general><general>State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China</general><general>State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China%State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TN</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope><scope>2B.</scope><scope>4A8</scope><scope>92I</scope><scope>93N</scope><scope>PSX</scope><scope>TCJ</scope></search><sort><creationdate>20180601</creationdate><title>Numerical Simulation of the Vortex-Induced Vibration of A Curved Flexible Riser in Shear Flow</title><author>Zhu, Hong-jun ; Lin, Peng-zhi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c393t-4fd868ae55e2c0bfb77cc1cd651f337a37edfd4fc2931dca03d82b60cb046c483</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Amplitude</topic><topic>Coastal Sciences</topic><topic>Columns (structural)</topic><topic>Computational fluid dynamics</topic><topic>Computer simulation</topic><topic>Engineering</topic><topic>Fluid flow</topic><topic>Fluid- and Aerodynamics</topic><topic>Marine & Freshwater Sciences</topic><topic>Numerical and Computational Physics</topic><topic>Oceanography</topic><topic>Offshore Engineering</topic><topic>Phase transitions</topic><topic>Reynolds number</topic><topic>Shear flow</topic><topic>Simulation</topic><topic>Three dimensional flow</topic><topic>Vibration</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhu, Hong-jun</creatorcontrib><creatorcontrib>Lin, Peng-zhi</creatorcontrib><collection>CrossRef</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Wanfang Data Journals - Hong Kong</collection><collection>WANFANG Data Centre</collection><collection>Wanfang Data Journals</collection><collection>万方数据期刊 - 香港版</collection><collection>China Online Journals (COJ)</collection><collection>China Online Journals (COJ)</collection><jtitle>China ocean engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhu, Hong-jun</au><au>Lin, Peng-zhi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Numerical Simulation of the Vortex-Induced Vibration of A Curved Flexible Riser in Shear Flow</atitle><jtitle>China ocean engineering</jtitle><stitle>China Ocean Eng</stitle><date>2018-06-01</date><risdate>2018</risdate><volume>32</volume><issue>3</issue><spage>301</spage><epage>311</epage><pages>301-311</pages><issn>0890-5487</issn><eissn>2191-8945</eissn><abstract>A series of fully three-dimensional (3D) numerical simulations of flow past a free-to-oscillate curved flexible riser in shear flow were conducted at Reynolds number of 185–1015. The numerical results obtained by the two-way fluid–structure interaction (FSI) simulations are in good agreement with the experimental results reported in the earlier study. It is further found that the frequency transition is out of phase not only in the inline (IL) and crossflow (CF) directions but also along the span direction. The mode competition leads to the non-zero nodes of the rootmean- square (RMS) amplitude and the relatively chaotic trajectories. The fluid–structure interaction is to some extent reflected by the transverse velocity of the ambient fluid, which reaches the maximum value when the riser reaches the equilibrium position. Moreover, the local maximum transverse velocities occur at the peak CF amplitudes, and the values are relatively large when the vibration is in the resonance regions. The 3D vortex columns are shed nearly parallel to the axis of the curved flexible riser. As the local Reynolds number increases from 0 at the bottom of the riser to the maximum value at the top, the wake undergoes a transition from a two-dimensional structure to a 3D one. More irregular small-scale vortices appeared at the wake region of the riser, undergoing large amplitude responses.</abstract><cop>Nanjing</cop><pub>Chinese Ocean Engineering Society</pub><doi>10.1007/s13344-018-0031-z</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Amplitude Coastal Sciences Columns (structural) Computational fluid dynamics Computer simulation Engineering Fluid flow Fluid- and Aerodynamics Marine & Freshwater Sciences Numerical and Computational Physics Oceanography Offshore Engineering Phase transitions Reynolds number Shear flow Simulation Three dimensional flow Vibration |
title | Numerical Simulation of the Vortex-Induced Vibration of A Curved Flexible Riser in Shear Flow |
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