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Model order reduction for bifurcating phenomena in fluid-structure interaction problems

TitleModel order reduction for bifurcating phenomena in fluid-structure interaction problems
Publication TypeJournal Article
Year of Publication2022
AuthorsKhamlich, M, Pichi, F, Rozza, G
JournalInternational Journal for Numerical Methods in FluidsInternational Journal for Numerical Methods in FluidsInt J Numer Meth Fluids
Volumen/a
Issuen/a
Date Published2022/05/23
ISBN Number0271-2091
KeywordsBifurcation theory; Coandă effect; continuum mechanics; fluid dynamics; monolithic method; parametrized fluid-structure interaction problem; Proper orthogonal decomposition; reduced order modeling
Abstract

Abstract This work explores the development and the analysis of an efficient reduced order model for the study of a bifurcating phenomenon, known as the Coand? effect, in a multi-physics setting involving fluid and solid media. Taking into consideration a fluid-structure interaction problem, we aim at generalizing previous works towards a more reliable description of the physics involved. In particular, we provide several insights on how the introduction of an elastic structure influences the bifurcating behavior. We have addressed the computational burden by developing a reduced order branch-wise algorithm based on a monolithic proper orthogonal decomposition. We compared different constitutive relations for the solid, and we observed that a nonlinear hyper-elastic law delays the bifurcation w.r.t. the standard model, while the same effect is even magnified when considering linear elastic solid.

URLhttps://doi.org/10.1002/fld.5118
Short TitleInternational Journal for Numerical Methods in Fluids

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