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01 July 2016
Unpublished conference/Abstract (Scientific congresses and symposiums)
Two novel ways to impose free-slip boundary conditions in fluid-structure interaction problems using the Particle Finite Element Method
Cerquaglia, Marco Lucio  ; Deliège, Geoffrey  ; Boman, Romain  et al.
2016 • ECCOMAS 2016
 

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Abstract :
[en] As well known, the imposition of boundary conditions is, in many cases, the trickiest part in solving differential problems, both from a physical and numerical standpoint. This work focuses on the way boundary conditions are accounted for in the solution of fluid-structure interaction problems using the Particle Finite Element Method (PFEM). In particular, the PFEM traditionally employs no-slip conditions on the fluid-solid interfaces. Our aim is twofold. On the one hand, we demonstrate that, in the framework of the PFEM, the no-slip hypothesis is too strong in some cases, leading to erroneous physical results, and that a free-slip condition is to be preferred instead; we therefore propose two novel ways to impose free-slip conditions, devoting special attention to generality, simplicity and robustness. On the other hand, we show how the use of free-slip boundary conditions can also be beneficial with regards to two major problems arising from the remeshing procedure employed by the PFEM: the violation of the mass conservation principle and the introduction of spurious pressure oscillations.
Disciplines :
Engineering, computing & technology: Multidisciplinary, general & others
Author, co-author :
Cerquaglia, Marco Lucio ;  Université de Liège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Deliège, Geoffrey ;  Université de Liège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Boman, Romain  ;  Université de Liège > Département d'aérospatiale et mécanique > Département d'aérospatiale et mécanique
Ponthot, Jean-Philippe  ;  Université de Liège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Language :
English
Title :
Two novel ways to impose free-slip boundary conditions in fluid-structure interaction problems using the Particle Finite Element Method
Publication date :
09 June 2016
Event name :
ECCOMAS 2016
Event date :
du 5 juin 2016 au 10 juin 2016
By request :
Yes
Audience :
International

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