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PARTITIONED SOLUTION OF THE UNSTEADY ADJOINT EQUATIONS FOR THE ONE-DIMENSIONAL FLOWIN A FLEXIBLE TUBE

Degroote, J.; Hojjat, M.; Stavropoulou, E.; Wüchner, R.; Bletzinger, K.-U.;

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For gradient-based optimization, the gradient of the objective function needs to be calculated repeatedly. If the number of design variables is high, this gradient can be obtained efficiently from adjoint equations. This research focuses on the gradient calculation for an objective function which involves a fluid-structure interaction (FSI) simulation. The interaction can be calculated in a partitioned way by coupling a flow solver with a structural solver. In this work, quasi-Newton coupling iterations with an approximation for the inverse of the Jacobian from a least-squares model (IQN-ILS) are employed for the state equations as well as for their adjoint equations. The problem at hand is the unsteady, one-dimensional flow of an incompressible, inviscid fluid in an elastic tube. Special attention has been given to the interface variables which are exchanged between the adjoint flow and structural solver, to avoid the communication of system matrices between them.

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Palavras-chave: Adjoint, Fluid-structure interaction, partitioned, quasi-Newton.,

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DOI: 10.5151/meceng-wccm2012-19599

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Como citar:

Degroote, J.; Hojjat, M.; Stavropoulou, E.; Wüchner, R.; Bletzinger, K.-U.; "PARTITIONED SOLUTION OF THE UNSTEADY ADJOINT EQUATIONS FOR THE ONE-DIMENSIONAL FLOWIN A FLEXIBLE TUBE", p. 3814-3831 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-19599

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