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FSI analysis of the blood flow and geometrical characteristics in the thoracic aorta

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Abstract

We present a fluid–structure interaction (FSI) analysis of the blood flow and geometrical characteristics in the thoracic aorta. The FSI is handled with the sequentially-coupled arterial FSI technique. The fluid mechanics equations are solved with the ST-VMS method, which is the variational multiscale version of the deforming-spatial-domain/stabilized space–time (DSD/SST) method. We focus on the relationship between the centerline geometry of the aorta and the flow field, which influences the wall shear stress distribution. The centerlines of the aorta models we use in our analysis are extracted from the CT scans, and we assume a constant diameter. Torsion-free model geometries are generated by projecting the original centerline to its averaged plane of curvature. The flow fields for the original and projected geometries are compared to examine the influence of the torsion.

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Acknowledgments

This work was supported by the JST-CREST Mathematics program. The authors would like to thank Dr. Ryo Torii at University College London for providing observed data of pressure history in the aorta.

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Authors and Affiliations

  1. Graduate School of Environmental and Life Sciences, Okayama University, 3-1-1 Tsushima-naka, Okayama, 700-8530, Japan

    Hiroshi Suito & Viet Q. H. Huynh

  2. Department of Modern Mechanical Engineering, Waseda Institute for Advanced Study, Waseda University, 1-6-1 Nishi-Waseda, Shinjuku-ku, Tokyo, 169-8050, Japan

    Kenji Takizawa

  3. Stanford University School of Medicine, 300 Pasteur Dr S072 MC 5105, Stanford, CA, 94305, USA

    Daniel Sze

  4. Department of Radiology, St. Luke’s International Hospital, 9-1 Akashi-cho, Tokyo, 104-8560, Japan

    Takuya Ueda

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  1. Hiroshi Suito
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Correspondence to Hiroshi Suito.

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Suito, H., Takizawa, K., Huynh, V.Q.H. et al. FSI analysis of the blood flow and geometrical characteristics in the thoracic aorta. Comput Mech 54, 1035–1045 (2014). https://doi.org/10.1007/s00466-014-1017-1

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