Characteristics of Blood Vessel Wall Deformation with Porous Wall Conditions in an Aortic Arch

Applied Rheology

Lee Choon Young¹  Park Cheol Woo¹  Hong Jung Goo¹  Kwak Moon Kyu¹  Cheema Taqi Ahmad¹  Kim Gyu Man¹ 

[1] School of Mechanical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-gu,Deagu702-701, South Korea;

关键词: aortic arch;    fluid structure interaction (fsi);    one-way coupling;    wall deformation;    physiological conditions;    porous media;   

DOI  :  10.3933/applrheol-24-24590

来源: DOAJ

【 摘 要 】

Blood vessels have been modeled as non-porous structures that are permeable to solutes mixed in the blood. However, the use of non-physiological boundary conditions in numerical simulations that assume atmospheric pressure at the outlet does not illustrate the actual structural physics involved. The presence of pores in the wall influences wall deformation characteristics, which may increase the risk of rupture in specific conditions. In addition, the formation of secondary flows in a curved blood vessel may add complications to the structural behavior of the vessel walls. These reservations can be addressed by a fluid structure interaction-based numerical simulation of a three-dimensional aortic arch with increased physiological velocity and pressure waveforms. The curvature radius of the arch was 30 mm with a uniform aorta diameter of 25 mm. A one-way coupling method was used between physics of porous media flow and structural mechanics. A comparison of results with a non-porous model revealed that the approximated porous model was more prone to hypertension and rupture. Similarly, the secondary flows found to be an important indicator for the vascular compliance that forced the outer aortic region to experience the largest deformation. Consequently, it is very important to use actual physiological situations of the blood vessels to reach a diagnostic solution.

【 授权许可】

Unknown