Influence of Turbulence in Aorta-like Tube: Computational and Experimental Study

Simple item page
dc.contributor.authorJagoš, Jiřícs
dc.contributor.authorKohút, Jiřícs
dc.contributor.authorKotek, Michalcs
dc.contributor.authorSkácel, Pavelcs
dc.contributor.authorBurša, Jiřícs
dc.coverage.issue5cs
dc.coverage.volume14cs
dc.date.issued2021-09-01cs
dc.description.abstractThe presented paper aims at comparison of modelling approaches to a pulsatile fluid flow in aorta-like tube; it investigates their influence on the shape of the velocity profiles and waveforms, and consequently on wall shear stress. Comparisons of computational results between rigid and compliant tubes with laminar and low Re turbulent models of fluid are presented. The results were validated with PIV experimental data through the velocity profile in the half-length section of the tube for both cases (rigid and compliant) and the overall agreement was very good, almost perfect for the rigid case. Frequency of the pulse pump in the experimental circuit was 1Hz, the diameter of the tube similar to 20 mm, and maximum deformation of the compliant tube during a period was 12%. The turbulent model improved the agreement with the experimental data by flattening the velocity profiles in both cases, but the effect was much more pronounced for the compliant tube, especially during the deceleration phase. This work confirms the hypothesis stated by Brindise and Vlachos (2018) that a longer deceleration phase triggers transition to turbulence. We put foundations for extension of this hypothesis to compliant tubes where this conclusion was confirmed for physiological Reynolds and Womersley numbers. The main outputs of this study are: (i) the length of deceleration phase should be considered (in addition to the geometry or severity of stenosis) in decision whether fluid simulations should be performed with or without laminar flow assumption; (ii) for fluid simulations of blood vessels considering their compliance, a special care should be devoted to time synchronization between BCs to prevent unphysiological waveforms.en
dc.formattextcs
dc.format.extent1411-1420cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationJournal of Applied Fluid Mechanics. 2021, vol. 14, issue 5, p. 1411-1420.en
dc.identifier.doi10.47176/jafm.14.05.32291cs
dc.identifier.issn1735-3645cs
dc.identifier.orcid0000-0003-2924-5872cs
dc.identifier.orcid0009-0003-7043-4859cs
dc.identifier.orcid0000-0002-8504-1287cs
dc.identifier.orcid0000-0002-2960-185Xcs
dc.identifier.other172470cs
dc.identifier.scopus26422543800cs
dc.identifier.scopus6602676789cs
dc.identifier.urihttp://hdl.handle.net/11012/201634
dc.language.isoencs
dc.publisherIsfahan University of Technologycs
dc.relation.ispartofJournal of Applied Fluid Mechanicscs
dc.relation.urihttps://jafmonline.net/JournalArchive/download?file_ID=56401&issue_ID=1014cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1735-3645/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectPulsatile flowen
dc.subjectPulse wave velocityen
dc.subjectCompliant tubeen
dc.subjectLow Re turbulent modelen
dc.subjectBoundary conditionen
dc.titleInfluence of Turbulence in Aorta-like Tube: Computational and Experimental Studyen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-172470en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:49:14en
sync.item.modts2025.01.17 18:32:28en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav mechaniky těles, mechatroniky a biomechanikycs
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
32291_050621144804.pdf
Size:
1.06 MB
Format:
Adobe Portable Document Format
Description:
32291_050621144804.pdf
Download
Collections
Ústav mechaniky těles, mechatroniky a biomechaniky