Abstract:
:The presence of a spiral arterial blood flow pattern in humans has been widely accepted. It is believed that this spiral component of the blood flow alters arterial haemodynamics in both positive and negative ways. The purpose of this study was to determine the effect of spiral flow on haemodynamic changes in aorta-renal bifurcations. In this regard, a computational fluid dynamics analysis of pulsatile blood flow was performed in two idealised models of aorta-renal bifurcations with and without flow diverter. The results show that the spirality effect causes a substantial variation in blood velocity distribution, while causing only slight changes in fluid shear stress patterns. The dominant observed effect of spiral flow is on turbulent kinetic energy and flow recirculation zones. As spiral flow intensity increases, the rate of turbulent kinetic energy production decreases, reducing the region of potential damage to red blood cells and endothelial cells. Furthermore, the recirculation zones which form on the cranial sides of the aorta and renal artery shrink in size in the presence of spirality effect; this may lower the rate of atherosclerosis development and progression in the aorta-renal bifurcation. These results indicate that the spiral nature of blood flow has atheroprotective effects in renal arteries and should be taken into consideration in analyses of the aorta and renal arteries.
journal_name
Comput Methods Biomech Biomed Enginauthors
Javadzadegan A,Simmons A,Barber Tdoi
10.1080/10255842.2015.1082552subject
Has Abstractpub_date
2016-01-01 00:00:00pages
964-76issue
9eissn
1025-5842issn
1476-8259journal_volume
19pub_type
杂志文章abstract::In this article, the problem of laminar, isothermal, incompressible and viscous flow in a rectangular domain bounded by two moving porous walls, which enable the fluid to enter or exit during successive expansions or contractions, is investigated. The governing non-linear equations and their associated boundary condit...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2010.497490
更新日期:2011-10-01 00:00:00
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journal_title:Computer methods in biomechanics and biomedical engineering
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doi:10.1080/10255842.2012.672565
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journal_title:Computer methods in biomechanics and biomedical engineering
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journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2012.683429
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journal_title:Computer methods in biomechanics and biomedical engineering
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doi:10.1080/10255842.2011.643467
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journal_title:Computer methods in biomechanics and biomedical engineering
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journal_title:Computer methods in biomechanics and biomedical engineering
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doi:10.1080/10255840601098098
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journal_title:Computer methods in biomechanics and biomedical engineering
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journal_title:Computer methods in biomechanics and biomedical engineering
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journal_title:Computer methods in biomechanics and biomedical engineering
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更新日期:1998-01-01 00:00:00
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journal_title:Computer methods in biomechanics and biomedical engineering
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doi:10.1080/10255842.2019.1599362
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journal_title:Computer methods in biomechanics and biomedical engineering
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journal_title:Computer methods in biomechanics and biomedical engineering
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journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2012.737458
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journal_title:Computer methods in biomechanics and biomedical engineering
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journal_title:Computer methods in biomechanics and biomedical engineering
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doi:10.1080/10255842.2018.1549658
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journal_title:Computer methods in biomechanics and biomedical engineering
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journal_title:Computer methods in biomechanics and biomedical engineering
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journal_title:Computer methods in biomechanics and biomedical engineering
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doi:10.1080/10255842.2018.1507025
更新日期:2018-09-01 00:00:00
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journal_title:Computer methods in biomechanics and biomedical engineering
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doi:10.1080/10255842.2018.1524884
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journal_title:Computer methods in biomechanics and biomedical engineering
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doi:10.1080/10255842.2017.1304542
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journal_title:Computer methods in biomechanics and biomedical engineering
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journal_title:Computer methods in biomechanics and biomedical engineering
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journal_title:Computer methods in biomechanics and biomedical engineering
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journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
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journal_title:Computer methods in biomechanics and biomedical engineering
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