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This work was developed with the aim of the doctoral grant SFRH/BD/144431/2019 and the projects UIDB/04436/2020, UIDB/04077/2020, funded by the Portuguese Foundation for Science and Technology (FCT) . This work was partially funded by Junta de Extremadura through grant IB20105 (partially financed by FEDER) . We thank the Programa Propio-Universidad Politecnica de Madrid, and the Ayuda Primeros Proyectos de Investigacion ETSII-UPM. We also thank Programa de Excelencia para el Profesorado Universitario de la Comunidad de Madrid for its financial support.

Analysis of institutional authors

Duenas-Pamplona, JAuthor

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Article

Comparison of RANS and LES turbulent flow models in a real stenosis

Publicated to:International Journal Of Heat And Fluid Flow. 107 109340- - 2024-07-01 107(), DOI: 10.1016/j.ijheatfluidflow.2024.109340

Authors: Lopes, D; Puga, H; Teixeira, J; Lima, R; Grilo, J; Duenas-Pamplona, J; Ferrera, C

Affiliations

Univ Extremadura, Dept Ingn Mecan Energet & Mat, Badajoz 06006, Spain - Author
Univ Extremadura, Inst Comp Cient Avanzada ICCAEx, Badajoz 06006, Spain - Author
Univ Minho, Mech Engn Dept, CMEMS UMinho, Campus Azurem, P-4800058 Guimaraes, Portugal - Author
Univ Minho, MEtRICs Mech Engn Dept, Campus Azurem, P-4800058 Guimaraes, Portugal - Author
Univ Politecn Madrid, Dept Ingn Energet, Avda Ramiro de Maeztu 7, Madrid 28040, Spain - Author
Univ Porto FEUP, CEFT, Fac Engn, Rua Roberto Frias, P-4200465 Porto, Portugal - Author
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Abstract

This study focuses on the performance of various turbulence models in predicting hemodynamic variables within a patient-specific geometry of the Brachiocephalic trunk exhibiting a severe stenosis. Numerical simulations employing Reynolds-averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES) models were conducted, comparing four RANS with two LES models. Results indicated significant differences in turbulent structures between RANS and LES models, with the k-omega RANS model closely approximating LES throughout the cardiac cycle. The velocity and Turbulent Kinetic Energy (TKE) results were consistent in the stenosis region due to the proximity to the inlet and plug flow conditions. However, notable disparities were observed in bifurcation and outlet regions. Time-Averaged Wall Shear Stress (TAWSS) comparisons revealed that the k-omega-based models provided closer agreement with LES, particularly in atherosclerosis-prone areas. The study highlights the limitations and strengths of each turbulence model, emphasizing the importance of model selection in simulating complex cardiovascular conditions. While RANS models demonstrated computational efficiency, their accuracy varied across regions. The effectiveness of the k-omega model in capturing the intricacies of such a complex flow field suggests its potential as a reliable and accurate tool for simulating physiological conditions with strong curvature and advanced stenosis.

Keywords

Arterial stiffnessBlood-flowComputational fluid dynamicsDirect numerical-simulationFluidLarge eddy simulationLarge-eddy simulationPulsatile flowReynolds-averaged navier stokesSteadyStenotic flowsTransitional flowTurbulent blood flowWall shear-stress

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal International Journal Of Heat And Fluid Flow due to its progression and the good impact it has achieved in recent years, according to the agency Scopus (SJR), it has become a reference in its field. In the year of publication of the work, 2024 there are still no calculated indicators, but in 2023, it was in position , thus managing to position itself as a Q1 (Primer Cuartil), in the category Mechanical Engineering.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-06-15:

  • Google Scholar: 5
  • WoS: 6
  • Scopus: 11

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-06-15:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 36 (PlumX).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://oa.upm.es/85163/

As a result of the publication of the work in the institutional repository, statistical usage data has been obtained that reflects its impact. In terms of dissemination, we can state that, as of

  • Views: 47
  • Downloads: 15

Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: Portugal.