Journal
SIAM JOURNAL ON NUMERICAL ANALYSIS
Volume 58, Issue 4, Pages 2019-2058Publisher
SIAM PUBLICATIONS
DOI: 10.1137/19M1276686
Keywords
Navier-Stokes equations; projection stabilization; proper orthogonal decomposition; reduced order models; incompressible flows; numerical analysis
Categories
Funding
- Spanish Government-EU Feder [RTI2018-093521-B-C31]
- Spanish State Research Agency through national program Juan de la Cierva-Incorporacion
Ask authors/readers for more resources
In this paper, we propose a new stabilized projection-based proper orthogonal decomposition reduced order model (POD-ROM) for the numerical simulation of incompressible flows. The new method draws inspiration from successful numerical stabilization techniques used in the context of finite element (FE) methods, such as local projection stabilization (LPS). In particular, the new LPS-ROM is a velocity-pressure ROM that uses pressure modes as well to compute the reduced order pressure needed for instance in the computation of relevant quantities, such as drag and lift forces on bodies in the flow. The new LPS-ROM circumvents the standard discrete inf-sup condition for the POD velocity-pressure spaces, whose fulfillment can be rather expensive in realistic applications in computational fluid dynamics (CFD). Also, the velocity modes do not have to be either strongly or weakly divergence-free, which allows the use of snapshots generated, for instance, with penalty or projection-based stabilized methods. The numerical analysis of the fully Navier-Stokes discretization for the new LPS-ROM is presented by mainly deriving the corresponding error estimates. Numerical studies are performed to discuss the accuracy and performance of the new LPS-ROM on a two-dimensional laminar unsteady flow past a circular obstacle.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available