POD-identification reduced order model of linear transport equations for control purposes

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Abstract

Intrusive reduced order modeling techniques require access to the solver's discretization and solution algorithm, which are not available for most computational fluid dynamics codes. Therefore, a nonintrusive reduction method that identifies the system matrix of linear fluid dynamical problems with a least-squares technique is presented. The methodology is applied to the linear scalar transport convection-diffusion equation for a 2D square cavity problem with a heated lid. The (time-dependent) boundary conditions are enforced in the obtained reduced order model (ROM) with a penalty method. The results are compared and the accuracy of the ROMs is assessed against the full order solutions and it is shown that the ROM can be used for sensitivity analysis by controlling the nonhomogeneous Dirichlet boundary conditions.

Details

Original languageEnglish
Pages (from-to)375-388
Number of pages8
JournalInternational journal for numerical methods in fluids
Volume90
Issue number8
DOIs
StatePublished - 5 Mar 2019

Keywords

  • POD , ROM, CFD, reduced order modeling

ID: 5398854