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Accurate Model Reduction of Transient Flows

Bernardo Galletti 1 Alessandro Bottaro Charles-Henri Bruneau 1, 2 Angelo Iollo 1, 2
1 MC2 - Modélisation, contrôle et calcul
INRIA Futurs, Université Bordeaux Segalen - Bordeaux 2, Université Sciences et Technologies - Bordeaux 1
Abstract : Some applications of a precise method to model the transient dynamics of large scale structures in the laminar flow past a bluff body are presented. The flow is described using empirical eigenfunctions obtained by "proper orthogonal decomposition"" and the models are constructed projecting the Navier-Stokes equations onto such eigenfunctions. The linear terms in the expansion coefficients as well as in the control inputs are adjusted to exactly mimic some reference solutions. Applications shown concern the development of flow instabilities leading to vortex shedding and the dynamics of the vortex wake under external actuation.
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Submitted on : Friday, May 19, 2006 - 8:10:09 PM
Last modification on : Thursday, February 11, 2021 - 2:46:02 PM
Long-term archiving on: : Sunday, April 4, 2010 - 8:59:02 PM


  • HAL Id : inria-00070337, version 1



Bernardo Galletti, Alessandro Bottaro, Charles-Henri Bruneau, Angelo Iollo. Accurate Model Reduction of Transient Flows. [Research Report] RR-5676, INRIA. 2005, pp.18. ⟨inria-00070337⟩



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