Author, as appears in the article.: Orozco G, Gonzalez-Hidalgo C, Mackie A, Diaz J, Roa Romero D
Department: Enginyeria Química
URV's Author/s: Mackie Walker, Allan Donald
Keywords: 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
Abstract: 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.
Thematic Areas: Thermodynamics Mechanics of materials Mechanics Mechanical engineering Matemática / probabilidade e estatística Engenharias iii Engenharias ii Engenharias i Condensed matter physics
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 17353572
Author's mail: allan.mackie@urv.cat
Author identifier: 0000-0002-1819-7820
Last page: 1345
Record's date: 2022-01-29
Journal volume: 12
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: 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
Papper original source: Journal Of Applied Fluid Mechanics. 12 (4): 1333-1345
APA: Orozco G, Gonzalez-Hidalgo C, Mackie A, Diaz J, Roa Romero D (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
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.29252/jafm.12.04.29434
Entity: Universitat Rovira i Virgili
Journal publication year: 2019
First page: 1333
Publication Type: Journal Publications