A Reduced Order Cut Finite Element method for geometrically parameterized steady and unsteady Navier-Stokes problems
Abstract
This work focuses on steady and unsteady Navier-Stokes equations in a reduced order modeling framework. The methodology proposed is based on a Proper Orthogonal Decomposition within a levelset geometry description and the problems of interest are discretized with an unfitted mesh Finite Element Method. We construct and investigate a unified and geometry independent reduced basis which overcomes many barriers and complications of the past, that may occur whenever geometrical morphings are taking place. By employing a geometry independent reduced basis, we are able to avoid remeshing and transformation to reference configurations, and we are able to handle complex geometries. This combination of a fixed background mesh in a fixed extended background geometry with reduced order techniques appears beneficial and advantageous in many industrial and engineering applications, which could not be resolved efficiently in the past.
Cite
@article{arxiv.2010.04953,
title = {A Reduced Order Cut Finite Element method for geometrically parameterized steady and unsteady Navier-Stokes problems},
author = {Efthymios N. Karatzas and Monica Nonino and Francesco Ballarin and Gianluigi Rozza},
journal= {arXiv preprint arXiv:2010.04953},
year = {2023}
}