Computer Methods in Applied Mechanics and Engineering
Chaotic dynamics of coherent structures
Proceedings of the eighth annual international conference of the Center for Nonlinear Studies on Advances in fluid turbulence
An overview of the Trilinos project
ACM Transactions on Mathematical Software (TOMS) - Special issue on the Advanced CompuTational Software (ACTS) Collection
libMesh: a C++ library for parallel adaptive mesh refinement/coarsening simulations
Engineering with Computers
Goal-oriented, model-constrained optimization for reduction of large-scale systems
Journal of Computational Physics
Reliable reduced-order models for time-dependent linearized Euler equations
Journal of Computational Physics
Local POD Plus Galerkin Projection in the Unsteady Lid-Driven Cavity Problem
SIAM Journal on Scientific Computing
Hi-index | 31.45 |
The Galerkin projection procedure for construction of reduced order models of compressible flow is examined as an alternative discretization of the governing differential equations. The numerical stability of Galerkin models is shown to depend on the choice of inner product for the projection. For the linearized Euler equations, a symmetry transformation leads to a stable formulation for the inner product. Boundary conditions for compressible flow that preserve stability of the reduced order model are constructed. Preservation of stability for the discrete implementation of the Galerkin projection is made possible using a piecewise-smooth finite element basis. Stability of the reduced order model using this approach is demonstrated on several model problems, where a suitable approximation basis is generated using proper orthogonal decomposition of a transient computational fluid dynamics simulation.