Computational analysis of the impact of aortic bifurcation geometry to AAA haemodynamics Full article
| Journal |
Russian Journal of Numerical Analysis and Mathematical Modelling
ISSN: 0927-6467 |
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| Output data | Year: 2022, Volume: 37, Number: 5, Pages: 311-329 Pages count : 19 DOI: 10.1515/rnam-2022-0026 | ||||
| Tags | AAA comorbidities; Abdominal aortic aneurysms; aortic bifurcation morphology; blood flow; computational fluid dynamics; haemodynamics; upstream effect | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Российский научный фонд | 21-15-00091 |
Abstract:
Abdominal aortic aneurysm is a widespread disease of cardiovascular system. Predicting a moment
of its rupture is an important task for modern vascular surgery. At the same time, little attention is paid to the
comorbidities, which are often the causes of severe postoperative complications or even death. This work is
devoted to a numerical study of the haemodynamics of the model geometry for possible localizations of abdominal
aortic aneurysm: on the aortic trunk or on its bifurcation. Both rigid and FSI numerical simulations
are considered and compared with the model aortic configuration without aneurysm. It is shown that in the
case of localization of the aneurysm on the bifurcation, the pressure in aorta increases upstream. Moreover,
only in the case of a special geometry,when the radii of the iliac arteries are equal (r1 = r2), and the angle between
them is 60 degrees, there is a linear relationship between the pressure in the aorta above the aneurysm
and the size of the aneurysm itself: the slope of the straight line is in the interval a ∈ (0.003; 0.857), and the
coefficient of determination is R2 ⩾ 0.75. The area bounded by the curve of the ‘pressure–velocity’ diagram
for the values of velocity and pressure upstream in the presence of an aneurysm decreases compared to a
healthy case (a vessel without an aneurysm). The simulation results in the rigid and FSI formulations agree
qualitatively with each other. The obtained results provide a better understanding of the relationship between
the geometrical parameters of the aneurysm and the changing of haemodynamics in the aortic bifurcation
and its effect on the cardiovascular system upstream of the aneurysm.
Cite:
Tikhvinskii D.V.
, Merzhoeva L.R.
, Chupakhin A.P.
, Karpenko A.A.
, Parshin D.V.
Computational analysis of the impact of aortic bifurcation geometry to AAA haemodynamics
Russian Journal of Numerical Analysis and Mathematical Modelling. 2022. V.37. N5. P.311-329. DOI: 10.1515/rnam-2022-0026 WOS Scopus РИНЦ OpenAlex
Computational analysis of the impact of aortic bifurcation geometry to AAA haemodynamics
Russian Journal of Numerical Analysis and Mathematical Modelling. 2022. V.37. N5. P.311-329. DOI: 10.1515/rnam-2022-0026 WOS Scopus РИНЦ OpenAlex
Dates:
| Published print: | Nov 1, 2022 |
Identifiers:
| Web of science: | WOS:000879493300005 |
| Scopus: | 2-s2.0-85142326939 |
| Elibrary: | 58918396 |
| OpenAlex: | W4308447774 |