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Coupled Systems Mechanics
  Volume 5, Number 3, September 2016, pages 235-254
DOI: http://dx.doi.org/10.12989/csm.2017.5.3.235
 
open access

Strongly coupling partitioned scheme for enhanced added mass computation in 2D fluid-structure interaction
Emmanuel Lefrançois, Anaïs Brandely and Stéphane Mottelet

 
Abstract
    A numerical model for fluid-structure interactions (abbr. FSI) is presented in the context of sloshing effects in movable, partially filled tanks to improve understanding of interactions between the fluid and the dynamics of a tank flexibly attached to a vehicle. The purpose of this model is to counteract the penalizing impact of the added mass effect on classical partitioned FSI coupling scheme: the proposed investigation is based on an added mass corrected version of the classical strongly coupled partitioned scheme presented in (Song et al. 2013). Results show that this corrected version systematically allows convergence to the coupled solution. In the rare cases where convergence is already obtained, the corrected version significantly reduces the number of iterations required. Finally, it is shown that the convergence limit imposed by added mass effect for the non-corrected coupling scheme, is directly dependent on the aspect ratio of the fluid domain and highly related to the precision order of the temporal discretization scheme.
 
Key Words
    fluid-structure interaction; added mass; sloshing; coupling partitioned scheme
 
Address
Emmanuel Lefrançois and Anaïs Brandely: Roberval Laboratory CNRS UMR 7337, Universite de Technologie de Compiegne-Sorbonne Universites, CS 60319, 60203 Compiegne, France
Stéphane Mottelet: TIMR Laboratory EA 4297, Universite de Technologie de Compiegne-Sorbonne Universites, CS 60319, 60203 Compiegne, France
 

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