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Numerical Study of Fluid-Structure Interaction of Microvasculature

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Fluid-Structure-Sound Interactions and Control (FSSIC 2017)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

Blood flow oscillations of 0.001–0.2 Hz are called vasomotion whose physiological mechanism has not been understood. This vasomotion can mirror human body conditions and initiate the pathogenesis sequence in some diseases. In the preliminary measurement of blood flow oscillations in radial artery at the wrist, a strong power spectral density (PSD) at ~0.1 Hz was found, indicating that low frequency flow oscillations play a dominate role in radial pulse pattern. To understand the interaction between vasomotion and cardiac rhythm in radial artery, numerical simulations were carried out. It is found that the natural frequency of the system decreases with the complexity of microvasculature system, and the inlet oscillating velocity interacts with the natural frequency to generate subharmonics. As the natural frequency in the constructed vessel system can be as low as 0.37 Hz, we speculate that the natural frequency of actual microcirculation is much lower, and the mechanism of vasomotion is actually due to the interaction of cardiac rhythm and microvasculature natural frequency.

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References

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Acknowledgements

Supports given by HKRGC PolyU 5202/13E and PolyU G-YBG9 & G-UACM are gratefully acknowledged.

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Authors and Affiliations

  1. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, HK, China

    S. H. Liu, T. X. Chi, S. Tian & Y. Liu

  2. College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, China

    S. Tian & Z. D. Su

  3. School of Mathematics and Statistics, University of Glasgow, Glasgow, UK

    X. Y. Luo

Authors
  1. S. H. Liu
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  2. T. X. Chi
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  3. S. Tian
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  4. Z. D. Su
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  5. Y. Liu
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  6. X. Y. Luo
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Corresponding author

Correspondence to Y. Liu .

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Editors and Affiliations

  1. Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, China

    Yu Zhou

  2. Nihon University, Tokyo, Japan

    Motoaki Kimura

  3. Nihon University, Tokyo, Japan

    Guoyi Peng

  4. Curtin University, Perth, Western Autralia, Australia

    A.D. Lucey

  5. The University of Hong Kong, Hong Kong, China

    Lixi Huang

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© 2019 Springer Nature Singapore Pte Ltd.

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Liu, S.H., Chi, T.X., Tian, S., Su, Z.D., Liu, Y., Luo, X.Y. (2019). Numerical Study of Fluid-Structure Interaction of Microvasculature. In: Zhou, Y., Kimura, M., Peng, G., Lucey, A., Huang, L. (eds) Fluid-Structure-Sound Interactions and Control. FSSIC 2017. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-10-7542-1_39

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  • DOI: https://doi.org/10.1007/978-981-10-7542-1_39

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-10-7541-4

  • Online ISBN: 978-981-10-7542-1

  • eBook Packages: EngineeringEngineering (R0)

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