Fluid-structure interaction analysis of bioprosthetic heart valves: Significance of arterial wall deformation.

Fluid-structure interaction analysis of bioprosthetic heart valves: Significance of arterial wall deformation.
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DOI:
10.1007/s00466-014-1059-4
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发表时间:
2014-10
影响因子:
4.1
通讯作者:
Hughes, Thomas J. R.
Hughes, Thomas J. R.
中科院分区:
工程技术2区
文献类型:
--
作者:
Hsu, Ming-Chen;Kamensky, David;Bazilevs, Yuri;Sacks, Michael S.;Hughes, Thomas J. R.

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我们提出了一个框架,该框架结合了变分浸入边界和任意拉格朗日-欧拉(ALE)方法,用于对植入动脉中允许在模型中变形的生物假体心脏瓣膜进行流固耦合(FSI)模拟。我们发现,当背景流体网格经历与弹性动脉的扩张和收缩相对应的变形时,FSI 的变分浸入边界方法对于心脏瓣膜分析仍然稳健且有效。此外,这项工作中提出的计算表明,动脉壁变形对模拟结果的真实性有很大贡献,导致流速和瓣膜运动更接近于实践中观察到的情况。
We propose a framework that combines variational immersed-boundary and arbitrary Lagrangian–Eulerian (ALE) methods for fluid–structure interaction (FSI) simulation of a bioprosthetic heart valve implanted in an artery that is allowed to deform in the model. We find that the variational immersed-boundary method for FSI remains robust and effective for heart valve analysis when the background fluid mesh undergoes deformations corresponding to the expansion and contraction of the elastic artery. Furthermore, the computations presented in this work show that the arterial wall deformation contributes significantly to the realism of the simulation results, leading to flow rates and valve motions that more closely resemble those observed in practice.
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