Title: Acoustic waves in homogenized fluid-saturated deforming periodic scaffolds under permanent flow
Authors: Rohan, Eduard
Cimrman, Robert
Naili, Salah
Citation: ROHAN, E., CIMRMAN, R., NAILI, S. Acoustic waves in homogenized fluid-saturated deforming periodic scaffolds under permanent flow. In: Proceedings of the International Conference on Structural Dynamic , EURODYN. Athens: European Association for Structural Dynamics, 2020. s. 562-577. ISBN 978-618-85072-0-3, ISSN 2311-9020.
Issue Date: 2020
Publisher: European Association for Structural Dynamics
Document type: konferenční příspěvek
URI: 2-s2.0-85099727354
ISBN: 978-618-85072-0-3
ISSN: 2311-9020
Keywords in different language: Acoustic waves;Homogenization;Porous media;Fluid-structure interaction;Advection;Wave dispersion
Abstract in different language: Acoustic waves in a poroelastic medium with periodic structure are studied with respect to permanent seepage flow which modifies the wave propagation. The homogenization method provides the macroscopic equations governing the dynamic response of an effective medium. whose the properties are determined by the characteristic responses. We consider a Newtonian slightly compressible fluid under the barotropic acoustic approximation. In contrast with usual simplifications, the advection phenomenon of the Navier-Stokes equations is accounted for. The homogenization results are based on the periodic unfolding method combined with the asymptotic expansion technique. The dynamic permeability depends on the fluid flow properties including the advection effects associated with an assumed stationary perfusion of the porous structure. Numerical results show influence of the advection velocity on the strong dispersion of the quasi-shear modes
Rights: Plný text je přístupný v rámci univerzity přihlášeným uživatelům.
© European Association for Structural Dynamics
Appears in Collections:Konferenční příspěvky / Conference papers (NTIS)

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