Haemodynamics of giant cerebral aneurysm: A comparison between the rigid-wall, one-way and two-way FSI models

All-Russian conference on Nonlinear Waves: Theory and New Applications

Khe, A.K.^1,2 ; Cherevko, A.A.^1,2 ; Chupakhin, A.P.^1,2 ; Bobkova, M.S.^2 ; Krivoshapkin, A.L.^3 ; Orlov, K.Yu.^3

Lavrentyev Institute of Hydrodynamics, Novosibirsk, Russia^1

Novosibirsk State University, Novosibirsk, Russia^2

Meshalkin Novosibirsk Research Institute of Circulation Pathology, Novosibirsk, Russia^3

关键词: Cerebral Aneurysms;    Computational time;    Flow-vessel interactions;    Fluid solid interaction;    Mechanical parameters;    Numerical solution;    Qualitative changes;    Quantitative comparison;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/722/1/012042/pdf
DOI  :  10.1088/1742-6596/722/1/012042

来源: IOP

【 摘 要 】

In this paper a computer simulation of a blood flow in cerebral vessels with a giant saccular aneurysm at the bifurcation of the basilar artery is performed. The modelling is based on patient-specific clinical data (both flow domain geometry and boundary conditions for the inlets and outlets). The hydrodynamic and mechanical parameters are calculated in the frameworks of three models: rigid-wall assumption, one-way FSI approach, and full (two-way) hydroelastic model. A comparison of the numerical solutions shows that mutual fluid- solid interaction can result in qualitative changes in the structure of the fluid flow. Other characteristics of the flow (pressure, stress, strain and displacement) qualitatively agree with each other in different approaches. However, the quantitative comparison shows that accounting for the flow-vessel interaction, in general, decreases the absolute values of these parameters. Solving of the hydroelasticity problem gives a more detailed solution at a cost of highly increased computational time.