Comparison of Laminar and Turbulent K–Omega Shear Stress Transport Models Under Realistic Boundary Conditions Using Clinical Data for Arterial Stenosis

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aut.relation.issue3
aut.relation.journalJournal of Engineering and Science in Medical Diagnostics and Therapy
aut.relation.volume8
dc.contributor.authorAl-Rawi, Mohammad
dc.contributor.authorBelkacemi, Djelloul
dc.contributor.authorAl-Jumaily, Ahmed M
dc.date.accessioned2024-11-05T03:47:33Z
dc.date.available2024-11-05T03:47:33Z
dc.date.issued2024-09-30
dc.description.abstract<jats:title>Abstract</jats:title> <jats:p>Early diagnosis of cardiovascular diseases (CVDs), including arterial stenosis, enables targeted treatments that reduce CVD mortality. It is vital to improve the accuracy of early diagnostic tools. Current computational studies of stenosis use mathematical models, such as laminar and k–omega shear stress transport (SST) models, available in ansys (Fluent and CFX), openfoam, and comsol software packages. Users can adjust boundary conditions, such as inlet velocity and outlet pressure using user-defined functions (UDFs) with different expressions and constant values. However, currently there is no rule over what to impose at these boundaries, and previous studies have used various assumptions, such as rigid artery wall, one-way fluid–structure interaction (FSI) or two-way FSI, and the blood's Newtonian or non-Newtonian material properties. This variety in construction has associated deviations of the models from the clinical data and lessens the value of the models as potential diagnostic or predictive tools for medical practitioners. In this study, we examine arterial stenosis models, with severities of 20%, 40%, and 50%, compared with the healthy artery analyzed in terms of strain energy to the artery wall. Additionally, we investigate elastic walls using one-way FSI, comparing with laminar and k–omega SST. These boundary conditions are based on clinical data. The results regarding the strain energy (mJ) behavior along the artery wall show that the k–omega SST model outperforms the laminar model for short arterial segments and under the Newtonian assumption with a no-slip boundary wall and turbulent flow.</jats:p>
dc.identifier.citationJournal of Engineering and Science in Medical Diagnostics and Therapy, ISSN: 2572-7958 (Print); 2572-7966 (Online), ASME International, 8(3). doi: 10.1115/1.4066258
dc.identifier.doi10.1115/1.4066258
dc.identifier.issn2572-7958
dc.identifier.issn2572-7966
dc.identifier.urihttp://hdl.handle.net/10292/18228
dc.languageen
dc.publisherASME International
dc.relation.urihttps://asmedigitalcollection.asme.org/medicaldiagnostics/article/8/3/031001/1203127/Comparison-of-Laminar-and-Turbulent-K-Omega-Shear
dc.rightsCopyright VC 2025 by ASME; reuse license CC-BY 4.0
dc.rights.accessrightsOpenAccess
dc.subject4012 Fluid Mechanics and Thermal Engineering
dc.subject40 Engineering
dc.subject4003 Biomedical Engineering
dc.subjectClinical Research
dc.subjectCardiovascular
dc.subjectCardiovascular
dc.subject3 Good Health and Well Being
dc.titleComparison of Laminar and Turbulent K–Omega Shear Stress Transport Models Under Realistic Boundary Conditions Using Clinical Data for Arterial Stenosis
dc.typeJournal Article
pubs.elements-id573236
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