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dc.contributor.authorKnudsen, Tor Huse
dc.contributor.authorSævik, Svein
dc.contributor.authorThorsen, Mats Jørgen
dc.date.accessioned2017-11-28T10:21:02Z
dc.date.available2017-11-28T10:21:02Z
dc.date.created2017-01-18T13:47:03Z
dc.date.issued2016
dc.identifier.isbn978-0-7918-4993-4
dc.identifier.urihttp://hdl.handle.net/11250/2468227
dc.description.abstractVortex induced vibrations (VIV) and slug flow are two important aspects for marine risers conveying a multiphase flow, and should be carefully examined due to the influence on the fatigue life of the structure. This article examines a truncated riser exposed to VIV with an internal two-phase slug flow. The main focus of the article was to examine the effect of internal slug flow on the VIV of a riser. The VIV were simulated in time domain with a linear structural model with constant pretension. Approximately 150 vortex shedding periods were simulated after the response reached steady state. An internal two-fluid flow was introduced, with constant internal velocity, pressure and uniform slug lengths. From the numerical study it was apparent that the slug velocity and slug length had an influence on the response pattern, amplitude and frequency. An analytical model that predicts additional response frequencies due to slug flow was also compared to the numerical studies. The analytical study produced similar additional response frequencies as the numerical study. The slug length and internal velocity can influence the response of the riser, and should be considered for marine risers conveying multiphase flow.nb_NO
dc.language.isoengnb_NO
dc.publisherAmerican Society of Mechanical Engineers (ASME)nb_NO
dc.relation.ispartofASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering, Volume 2: CFD and VIV
dc.titleNumerical Analysis of Combined VIV and Slug Flow in Time Domainnb_NO
dc.typeChapternb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.identifier.doi10.1115/OMAE2016-54891
dc.identifier.cristin1430909
dc.description.localcodeThis chapter will not be available due to copyright restrictions (c) 2016 by ASMEnb_NO
cristin.unitcode194,64,20,0
cristin.unitnameInstitutt for marin teknikk
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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