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A reduced-order shifted boundary method for parametrized incompressible Navier–Stokes equations

TitleA reduced-order shifted boundary method for parametrized incompressible Navier–Stokes equations
Publication TypeJournal Article
Year of Publication2020
AuthorsKaratzas, EN, Stabile, G, Nouveau, L, Scovazzi, G, Rozza, G
JournalComputer Methods in Applied Mechanics and Engineering
Volume370
Abstract

We investigate a projection-based reduced order model of the steady incompressible Navier–Stokes equations for moderate Reynolds numbers. In particular, we construct an “embedded” reduced basis space, by applying proper orthogonal decomposition to the Shifted Boundary Method, a high-fidelity embedded method recently developed. We focus on the geometrical parametrization through level-set geometries, using a fixed Cartesian background geometry and the associated mesh. This approach avoids both remeshing and the development of a reference domain formulation, as typically done in fitted mesh finite element formulations. Two-dimensional computational examples for one and three parameter dimensions are presented to validate the convergence and the efficacy of the proposed approach.

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85087886522&doi=10.1016%2fj.cma.2020.113273&partnerID=40&md5=d864e4808190b682ecb1c8b27cda72d8
DOI10.1016/j.cma.2020.113273

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