U-duct turbulent-flow computation with the ST-VMS method and isogeometric discretization

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dc.citation.firstpage823en_US
dc.citation.journalTitleComputational Mechanicsen_US
dc.citation.lastpage843en_US
dc.citation.volumeNumber67en_US
dc.contributor.authorAydinbakar, Leventen_US
dc.contributor.authorTakizawa, Kenjien_US
dc.contributor.authorTezduyar, Tayfun E.en_US
dc.contributor.authorMatsuda, Daisakuen_US
dc.contributor.orgMechanical Engineeringen_US
dc.date.accessioned2021-06-07T20:22:33Zen_US
dc.date.available2021-06-07T20:22:33Zen_US
dc.date.issued2021en_US
dc.description.abstractThe U-duct turbulent flow is a known benchmark problem with the computational challenges of high Reynolds number, high curvature and strong flow dependence on the inflow profile. We use this benchmark problem to test and evaluate the Space–Time Variational Multiscale (ST-VMS) method with ST isogeometric discretization. A fully-developed flow field in a straight duct with periodicity condition is used as the inflow profile. The ST-VMS serves as the core method. The ST framework provides higher-order accuracy in general, and the VMS feature of the ST-VMS addresses the computational challenges associated with the multiscale nature of the unsteady flow. The ST isogeometric discretization enables more accurate representation of the duct geometry and increased accuracy in the flow solution. In the straight-duct computations to obtain the inflow velocity, the periodicity condition is enforced with the ST Slip Interface method. All computations are carried out with quadratic NURBS meshes, which represent the circular arc of the duct exactly in the U-duct computations. We investigate how the results vary with the time-averaging range used in reporting the results, mesh refinement, and the Courant number. The results are compared to experimental data, showing that the ST-VMS with ST isogeometric discretization provides good accuracy in this class of flow problems.en_US
dc.identifier.citationAydinbakar, Levent, Takizawa, Kenji, Tezduyar, Tayfun E., et al.. "U-duct turbulent-flow computation with the ST-VMS method and isogeometric discretization." <i>Computational Mechanics,</i> 67, (2021) Springer Nature: 823-843. https://doi.org/10.1007/s00466-020-01965-4.en_US
dc.identifier.digitalU-ductTurbulent-flowComputatioen_US
dc.identifier.doihttps://doi.org/10.1007/s00466-020-01965-4en_US
dc.identifier.urihttps://hdl.handle.net/1911/110680en_US
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.rightsThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleU-duct turbulent-flow computation with the ST-VMS method and isogeometric discretizationen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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