Persitaltic driven flows in piezoelectric porous dynamic metamaterials - homogenization based modelling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F23%3A43970037" target="_blank" >RIV/49777513:23520/23:43970037 - isvavai.cz</a>

Výsledek na webu

<a href="https://2023.compdyn.org/proceedings/pdf/21328.pdf" target="_blank" >https://2023.compdyn.org/proceedings/pdf/21328.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Persitaltic driven flows in piezoelectric porous dynamic metamaterials - homogenization based modelling

Popis výsledku v původním jazyce

The paper deals with the homogenization-based modelling of periodic porous structures saturated by a Newtonian fluid and locally controlable due to embedded piezoelectric segments which can induce a peristaltic deformation of the microchannels, in response to prescribed propagating voltage waves. The two-scale homogenized problem is nonlinear by the consequence deformation-dependent homogenized coefficients in the macroscopic equations. For this, a linear expansions based on the sensitivity analysis of the homogenized coefficients with respect to the deformation induced by the macroscopic quantities is employed. A special care is needed to apply this approach to the dynamic permeability which is involved in the time convolution integrals. This approximate treatment of the non-linearity is justified as far as the deformations are moderate. As an advantage, it enables to reduce the computational cost not exceeding much the one of linear problems. At the same time, the nonlinearity is important to capture the pumping effect of the porous material in a case of time periodic actuation by electric field.

Název v anglickém jazyce

Persitaltic driven flows in piezoelectric porous dynamic metamaterials - homogenization based modelling

Popis výsledku anglicky

The paper deals with the homogenization-based modelling of periodic porous structures saturated by a Newtonian fluid and locally controlable due to embedded piezoelectric segments which can induce a peristaltic deformation of the microchannels, in response to prescribed propagating voltage waves. The two-scale homogenized problem is nonlinear by the consequence deformation-dependent homogenized coefficients in the macroscopic equations. For this, a linear expansions based on the sensitivity analysis of the homogenized coefficients with respect to the deformation induced by the macroscopic quantities is employed. A special care is needed to apply this approach to the dynamic permeability which is involved in the time convolution integrals. This approximate treatment of the non-linearity is justified as far as the deformations are moderate. As an advantage, it enables to reduce the computational cost not exceeding much the one of linear problems. At the same time, the nonlinearity is important to capture the pumping effect of the porous material in a case of time periodic actuation by electric field.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/GA21-16406S" target="_blank" >GA21-16406S: Nelineární akustika a transportní procesy v porézních periodických strukturách</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

COMPDYN Proceedings

ISBN

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ISSN

2623-3347

e-ISSN

2623-3347

Počet stran výsledku

12

Strana od-do

1-12

Název nakladatele

National Technical University of Athens

Místo vydání

Řecko

Místo konání akce

Athens

Datum konání akce

12. 6. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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