In this talk the development of a Reduced Order Model (ROM) using a PODGalerkin approach for the simulation of laminar and turbulent vortexshedding flows around a circular cylinder is investigated. The Proper Orthogonal Decomposition (POD) is used to decompose the flow fields, derived from a highfidelity finite volume approximation, into a set of spatial modes and temporal amplitudes. The POD approach permits to create spatial bases that are optimal in terms of energy, and a Galerkin projection of the governing equations onto the spatialmodes is performed in order to obtain a system of ordinary differential equations for the evolution of the timedependent amplitudes. The projection is performed using the incompressible NavierStokes equations for the laminar case and incompressible Reynolds Averaged NavierStokes (RANS) equations for the turbulent case. The boundary conditions are enforced on the ROM using a penalty approach. The applicability and accuracy of the present method is studied and discussed for different values of the Reynolds numbers and for different phenomena used as benchmark test cases.
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PODGalerkin Reduced Order Model for the simulation of laminar and turbulent flows around a circular cylinder
Research Group:
Saddam Hijazi
Institution:
SISSA AMMA, formerly University of L'Aquila, MATHMODS
Location:
Big Meeting Room (Seventh floor)
Schedule:
Wednesday, November 16, 2016  16:30
Abstract:
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