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A finite element analysis of turbulent eccentric stenotic flows by large eddy simulation

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Abstract

Blood flows with stenosis may cause turbulence. In such a case, vessels may be damaged by the turbulent flow because the velocity gradient of turbulent flow is large near the wall. It is very important to predict turbulence accurately. Generally, the shape of the stenotic vessel is quite complicated. Finite element method (FEM) is adopted because it is able to easily handle the stenotic vessel with unstructured meshes. Also, based on FEM, large eddy simulation (LES) is implemented to accurately solve turbulent flows in a vessel. To verify the accuracy of the LES technique developed, it is applied to the turbulent flow in an eccentric stenosis flow considered by Varghese et al. [1]. The simulation results showed that laminar flow occurs at the inlet region, whereas turbulence flow occurs after stenosis region. The present results show a reasonably good agreement with the DNS results of Varghese et al. [1].

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Authors and Affiliations

  1. Department of Energy System, Seoul National University of Science and Technology, Seoul, 139-743, Korea

    Byoung Jin Jeon

  2. Department of Mechanical System Design Engineering, Seoul National University of Science and Technology, Seoul, 139-743, Korea

    Jungwoo Kim

  3. Department of Mechanical/Automotive Engineering, Seoul National University of Science and Technology, Seoul, 139-743, Korea

    Hyoung Gwon Choi

Authors
  1. Byoung Jin Jeon
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  2. Jungwoo Kim
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  3. Hyoung Gwon Choi
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Corresponding author

Correspondence to Jungwoo Kim.

Additional information

This paper was presented at the 10th ACFD, Jeju, Korea, October 2014. Recommended by Guest Editor Hyoung-Gwon Choi

Byoung-jin Jeon received a Ph.D. at Seoul National University of Science and Technology majoring in computational fluid dynamics based on finite element method. He is currently a Post-Doc in the integrative cardiovascular imaging research center of Yonsei University.

Jungwoo Kim obtained his B.S., M.S. and Ph.D. degrees at the Department of Mechanical Engineering, Seoul National University, Korea, in 1999, 2001 and 2005. Dr. Kim is currently an assistant professor at the Department of Mechanical System Design Engineering, Seoul National University of Science and Technology.

Hyoung-gwon Choi received a Ph.D. at Seoul National University majoring in computational fluid dynamics based on finite element method. He is currently a professor in the department of mechanical engineering of Seoul National University of Science and Technology.

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Jeon, B.J., Kim, J. & Choi, H.G. A finite element analysis of turbulent eccentric stenotic flows by large eddy simulation. J Mech Sci Technol 29, 1869–1874 (2015). https://doi.org/10.1007/s12206-015-0407-4

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  • DOI: https://doi.org/10.1007/s12206-015-0407-4

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