Acoustic properties of porous metamaterials featured by acoustic streaming - homogenization based modelling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F24%3A43973625" target="_blank" >RIV/49777513:23520/24:43973625 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.ingentaconnect.com/content/ince/incecp/2024/00000270/00000002/art00101" target="_blank" >https://www.ingentaconnect.com/content/ince/incecp/2024/00000270/00000002/art00101</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3397/IN_2024_4321" target="_blank" >10.3397/IN_2024_4321</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Acoustic properties of porous metamaterials featured by acoustic streaming - homogenization based modelling

Popis výsledku v původním jazyce

We consider secondary effects induced by acoustic waves in viscous barotropic fluids saturating pores in elastic, or rigid scaffolds with elastically suspended particles. The asymptotic homogenization method is applied to derive models of the acoustic wave propagation and of the related acoustic streaming (AS) as the secondary effect. This phenomenon originating due to the nonlinearity (divergence of the Reynolds stress) in the Navier Stokes equation is retained using the perturbation analysis. This yields the first and the second order sub-problem enabling to linearize the model governing fluid dynamics. The local AS in the microstructure produces forces acting on the suspended particles, transforming the pore geometry, hence, modulating the acoustic properties. As the consequence, the permeability involved in both the subproblems is modified due to the slowly oscillating particles. The sensitivity analysis can be employed to introduce the homogenized coefficients of the model depending on the particle motion.

Název v anglickém jazyce

Acoustic properties of porous metamaterials featured by acoustic streaming - homogenization based modelling

Popis výsledku anglicky

We consider secondary effects induced by acoustic waves in viscous barotropic fluids saturating pores in elastic, or rigid scaffolds with elastically suspended particles. The asymptotic homogenization method is applied to derive models of the acoustic wave propagation and of the related acoustic streaming (AS) as the secondary effect. This phenomenon originating due to the nonlinearity (divergence of the Reynolds stress) in the Navier Stokes equation is retained using the perturbation analysis. This yields the first and the second order sub-problem enabling to linearize the model governing fluid dynamics. The local AS in the microstructure produces forces acting on the suspended particles, transforming the pore geometry, hence, modulating the acoustic properties. As the consequence, the permeability involved in both the subproblems is modified due to the slowly oscillating particles. The sensitivity analysis can be employed to introduce the homogenized coefficients of the model depending on the particle motion.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/GA24-12291S" target="_blank" >GA24-12291S: Víceškálové modelování akusticky vyvolaného proudění tekutin a částicových suspenzí v adaptivních porézních strukturách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

INTER-NOISE and NOISE-CON Congress and Conference Proceedings

ISBN

979-8-3313-2215-1

ISSN

0736-2935

e-ISSN

0736-2935

Počet stran výsledku

9

Strana od-do

9906-9914

Název nakladatele

Neuveden

Místo vydání

Neuveden

Místo konání akce

Nantes, France

Datum konání akce

25. 8. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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