Computational analysis of high frequency fluid-structure interactions in constricted flow

Salman H. E., SERT C., YAZICIOĞLU Y.

COMPUTERS & STRUCTURES, vol.122, pp.145-154, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 122
  • Publication Date: 2013
  • Doi Number: 10.1016/j.compstruc.2012.12.024
  • Journal Name: COMPUTERS & STRUCTURES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.145-154
  • Keywords: Fluid structure interaction, Blood flow simulation, Stenosis, Constricted flow, Vessel wall vibration, TURBULENT-FLOW, MODEL, STENOSES, PHONOANGIOGRAPHY, VESSELS, TUBE
  • Middle East Technical University Affiliated: Yes

Abstract

Constricted flow in a thin cylindrical shell with an idealized blunt constriction is modeled using ADINA. Highly disturbed recirculation region is observed at the constriction exit where pressure fluctuations and consequential vessel wall vibrations display broadband spectral content over a range of several hundred Hz. Maximum dynamic pressure and vibration amplitudes are observed around the reattachment point and they gradually decrease along downstream of flow. Results obtained by numerical simulations are compared with relevant studies in the literature and are in good agreement in terms of general spectral behavior. However, the amplitudes were significantly lower as compared to experimental results. (C) 2013 Elsevier Ltd. All rights reserved.