Numerical study of fluid-structure interaction of microvasculature

Shuhong Liu, T. X. Chi, shuang Tian, Z. D. Su, Yang Liu, X. Y. Luo

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

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.

Original languageEnglish
Title of host publicationFluid-Structure-Sound Interactions and Control- Proceedings of the 4th Symposium on Fluid-Structure-Sound Interactions and Control, 2019
EditorsMotoaki Kimura, Guoyi Peng, A.D. Lucey, Lixi Huang, Yu Zhou
PublisherPleiades Publishing
Pages257-261
Number of pages5
ISBN (Print)9789811075414
DOIs
Publication statusPublished - 2019
Event4th Symposium on Fluid-Structure-Sound Interactions and Control, FSSIC 2017 - Tokyo, Japan
Duration: 21 Aug 201724 Aug 2017

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364

Conference

Conference4th Symposium on Fluid-Structure-Sound Interactions and Control, FSSIC 2017
CountryJapan
CityTokyo
Period21/08/1724/08/17

Keywords

  • FFT
  • FSI
  • Microvasculature
  • Wavelet

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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