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Communication dans un congrès
Numerical analysis and simulation of the interaction between a Von Kármán vortex street and elastic flaps
Abstract : The performance improvement of heat exchangers is a major challenge in many industries. Some of these heat exchangers use vortex generators to produce coherent structures that enhance the heat and mass transfer. The aim of this study is to numerically investigate the vortices generated by introducing flexible flaps into an oscillating and laminar flow. More specifically, a square cylinder is inserted into a two-dimensional domain such that a Von Kármán street vortex is generated. The successive wake vortices disrupt a flexible structure that oscillates and produce coherent structures.
The study is performed by numerical simulations. The fluid-solid coupling dynamics and the deformation of the flexible element are simulated using a tool developed with the open source library OpenFOAM. The finite volume method is used to discretize the geometry. The problem is then solved by using the PIMPLE algorithm and a partitioned approach for fluid-structure interaction. The dynamic solver is coupled with a mesh deformation procedure based on Laplace smoothing equation with variable mesh diffusion. The solvers and the coupling method used for modeling fluid-structure interaction are detailed first. The effects of the elastic properties of the flexible structure on the oscillations and the topology of the flow are then investigated.
https://hal.univ-angers.fr/hal-03287161
Contributeur : Okina Université d'Angers <>
Soumis le : jeudi 15 juillet 2021 - 14:26:30
Dernière modification le : vendredi 16 juillet 2021 - 03:41:51
Contributeur : Okina Université d'Angers <>
Soumis le : jeudi 15 juillet 2021 - 14:26:30
Dernière modification le : vendredi 16 juillet 2021 - 03:41:51
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