Reference : Comparison of Data Transfer Methods between Meshes in the Frame of the Arbitrary Lagrang...

	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Mechanical engineering
	To cite this reference:	http://hdl.handle.net/2268/100497

Title :	Comparison of Data Transfer Methods between Meshes in the Frame of the Arbitrary Lagrangian Eulerien Formalism
Language :	English
Author, co-author :	Bussetta, Philippe [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire >]
	Boman, Romain [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire >]
	Ponthot, Jean-Philippe [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire >]
Publication date :	Nov-2011
Main document title :	Proceedings of "Fifth International Conference on Advanced COmputationalMethods in ENgineering"
On invitation :	No
Audience :	International
Event name :	Fifth International Conference on Advanced COmputationalMethods in ENgineering (ACOMEN 2011)
Event date :	14 - 17 November 2011
Event place (city) :	Liège
Event country :	Belgium
Keywords :	[en] Finite Elements Method ; Arbitrary Lagrangian Eulerien ; Transfer Method ; Finite Volumes ; Mortar Elements
Abstract :	[en] In nonlinear solid Mechanics, the Arbitrary Lagrangian Eulerian (ALE) formalism is a common way to avoid mesh distortion when very large deformations occur in the modelled process. Usually, the ALE resolution procedure is based on an “operator split”, the second part of which is a Data Transfer between two meshes sharing the same topology (same number of nodes and same number of element neighbours for each of them). Thanks to this interesting property, classical ALE transfer algorithms can bemuchmore optimised in terms of CPU time than the ones that are used in the frame of a complete remeshing. However, the resulting CPU-efficient transfer schemes suffer from two main drawbacks. The first one is a spurious crosswind diffusion coming from the corner fluxes that have been neglected. The second issue is the number of explicit transfer steps which may become very large when the element size decreases. In this paper, these classical ALE Data Transfer methods are compared to more general algorithms which do not make any assumption on the topology of both meshes.
Funders :	the Walloon Region
Name of the research project :	the STIRHETAL project (WINNOMAT program, convention number 0716690)
Permalink :	http://hdl.handle.net/2268/100497

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