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FSI simulation of asymmetric mitral valve dynamics during diastolic filling

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  • S. Dahl
  • J. Vierendeels
  • J. Degroote
  • S. Annerel
  • L. Hellevik
  • B. Skallerud

Abstract

In this article, we present a fluid–structure interaction algorithm accounting for the mutual interaction between two rigid bodies. The algorithm was used to perform a numerical simulation of mitral valve (MV) dynamics during diastolic filling. In numerical simulations of intraventricular flow and MV motion, the asymmetry of the leaflets is often neglected. In this study the MV was rendered as two rigid, asymmetric leaflets. The 2D simulations incorporated the dynamic interaction of blood flow and leaflet motion and an imposed subject-specific, transient left ventricular wall movement obtained from ultrasound recordings. By including the full Jacobian matrix in the algorithm, the speed of the simulation was enhanced by more than 20% compared to using a diagonal Jacobian matrix. Furthermore, our results indicate that important features of the flow field may not be predicted by the use of symmetric leaflets or in the absence of an adequate model for the left atrium.

Suggested Citation

  • S. Dahl & J. Vierendeels & J. Degroote & S. Annerel & L. Hellevik & B. Skallerud, 2012. "FSI simulation of asymmetric mitral valve dynamics during diastolic filling," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 15(2), pages 121-130.
    • Handle: RePEc:taf:gcmbxx:v:15:y:2012:i:2:p:121-130
    DOI: 10.1080/10255842.2010.517200
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    Cited by:

    1. Bee Ting Chan & Einly Lim & Chi Wei Ong & Noor Azuan Abu Osman, 2015. "Effect of spatial inlet velocity profiles on the vortex formation pattern in a dilated left ventricle," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 18(1), pages 90-96, January.
    2. Siamak N. Doost & Liang Zhong & Boyang Su & Yosry S. Morsi, 2017. "Two-dimensional intraventricular flow pattern visualization using the image-based computational fluid dynamics," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 20(5), pages 492-507, April.

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