TY - JOUR T1 - Model order reduction for bifurcating phenomena in fluid-structure interaction problems JF - International Journal for Numerical Methods in FluidsInternational Journal for Numerical Methods in FluidsInt J Numer Meth Fluids Y1 - 2022 A1 - Moaad Khamlich A1 - Federico Pichi A1 - Gianluigi Rozza KW - Bifurcation theory KW - Coandă effect KW - continuum mechanics KW - fluid dynamics KW - monolithic method KW - parametrized fluid-structure interaction problem KW - Proper orthogonal decomposition KW - reduced order modeling AB -

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.

VL - n/a SN - 0271-2091 UR - https://doi.org/10.1002/fld.5118 IS - n/a JO - International Journal for Numerical Methods in Fluids ER -