Articles producció científica> Enginyeria Química

Blood flow in channel constrictions: a lattice-Boltzmann consistent comparison between Newtonian and non-Newtonian models

  • Dades identificatives

    Identificador: imarina:5133047
    Autors:
    Orozco, G AGonzalez-Hidalgo, C TMackie, A DDiaz, J CRomero, D A Roa
    Resum:
    Lattice Boltzmann simulations have been carried out in order to study the flow of blood in normal and constricted blood channels using Newtonian and non-Newtonian rheological models. Instead of using parameters from previous works as is usually done, we propose a new optimization methodology that provides in a consistent manner the complete set of parameters for the studied models, namely Newtonian, Carreau-Yassuda and Kuang-Luo. The optimization was performed simultaneously using experimental data from several sources. Physical observables such as velocity profiles, shear rate profiles and pressure fields were evaluated. For the normal channel case, it was found that the Newtonian model predicts both the highest velocity and shear rates profiles followed by the Carreau-Yassuda and the Kuang-Luo models. For a constricted channel, important differences were found in the velocity profiles among the studied models. First, the Newtonian model was observed to predict the velocity profile maximum at different channel width positions compared to the non-Newtonian ones. Second, the obtained recirculation region was found to be longer for the Newtonian models. Finally, concerning the constriction shape, the global velocity was found to be lower for a rectangular geometry than for a semi-circular one.
  • Altres:

    Autor segons l'article: Orozco, G A; Gonzalez-Hidalgo, C T; Mackie, A D; Diaz, J C; Romero, D A Roa
    Departament: Enginyeria Química
    Autor/s de la URV: Mackie Walker, Allan Donald
    Paraules clau: Wall Viscosity Vessel Simultaneous optimization Rheology Platelet deposition Non-newtonian models Non-newtonian fluid flow Lattice-boltzmann Large arteries Hematocrit Constitutive equation Computational simulation Computational fluid dynamics Coagulation Cfd - computational fluid dynamics Blood rheology
    Resum: Lattice Boltzmann simulations have been carried out in order to study the flow of blood in normal and constricted blood channels using Newtonian and non-Newtonian rheological models. Instead of using parameters from previous works as is usually done, we propose a new optimization methodology that provides in a consistent manner the complete set of parameters for the studied models, namely Newtonian, Carreau-Yassuda and Kuang-Luo. The optimization was performed simultaneously using experimental data from several sources. Physical observables such as velocity profiles, shear rate profiles and pressure fields were evaluated. For the normal channel case, it was found that the Newtonian model predicts both the highest velocity and shear rates profiles followed by the Carreau-Yassuda and the Kuang-Luo models. For a constricted channel, important differences were found in the velocity profiles among the studied models. First, the Newtonian model was observed to predict the velocity profile maximum at different channel width positions compared to the non-Newtonian ones. Second, the obtained recirculation region was found to be longer for the Newtonian models. Finally, concerning the constriction shape, the global velocity was found to be lower for a rectangular geometry than for a semi-circular one.
    Àrees temàtiques: Thermodynamics Mechanics of materials Mechanics Mechanical engineering Matemática / probabilidade e estatística Engenharias iii Engenharias ii Engenharias i Condensed matter physics
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 17353572
    Adreça de correu electrònic de l'autor: allan.mackie@urv.cat
    Identificador de l'autor: 0000-0002-1819-7820
    Pàgina final: 1345
    Data d'alta del registre: 2024-10-12
    Volum de revista: 12
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: http://jafmonline.net/web/guest/29?p_p_id=JournalArchive_WAR_JournalArchive_INSTANCE_viiD&p_p_action=0&p_p_state=normal&p_p_mode=view&p_p_col_id=column-1&p_p_col_pos=1&p_p_col_count=2&_JournalArchive_WAR_JournalArchive_INSTANCE_viiD_form_page=main_form&selectedVolumeId=75&selectedIssueId=1001
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Journal Of Applied Fluid Mechanics. 12 (4): 1333-1345
    Referència de l'ítem segons les normes APA: Orozco, G A; Gonzalez-Hidalgo, C T; Mackie, A D; Diaz, J C; Romero, D A Roa (2019). Blood flow in channel constrictions: a lattice-Boltzmann consistent comparison between Newtonian and non-Newtonian models. Journal Of Applied Fluid Mechanics, 12(4), 1333-1345. DOI: 10.29252/jafm.12.04.29434
    DOI de l'article: 10.29252/jafm.12.04.29434
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2019
    Pàgina inicial: 1333
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Condensed Matter Physics,Mechanical Engineering,Mechanics,Mechanics of Materials,Thermodynamics
    Wall
    Viscosity
    Vessel
    Simultaneous optimization
    Rheology
    Platelet deposition
    Non-newtonian models
    Non-newtonian fluid flow
    Lattice-boltzmann
    Large arteries
    Hematocrit
    Constitutive equation
    Computational simulation
    Computational fluid dynamics
    Coagulation
    Cfd - computational fluid dynamics
    Blood rheology
    Thermodynamics
    Mechanics of materials
    Mechanics
    Mechanical engineering
    Matemática / probabilidade e estatística
    Engenharias iii
    Engenharias ii
    Engenharias i
    Condensed matter physics
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