Title: A fast and robust hybrid method for block-structured mesh deformation with emphasis on FSI-LES applications
Authors: Sen, Shuvam
De Nayer, Guillaume 
Breuer, Michael 
Language: eng
Issue Date: 2017
Publisher: Wiley
Document Type: Article
Source: Enthalten in: International journal for numerical methods in engineering. - Chichester [u.a.] : Wiley, 1969. - Online-Ressource . - Bd. 111.2017, 3, Seite 273-300
Journal / Series / Working Paper (HSU): International journal for numerical methods in engineering : IJNME
Volume: 111
Issue: 3
Page Start: 273
Page End: 300
Publisher Place: Chichester
Copyright © 2016 John Wiley & Sons, Ltd. The present work introduces an efficient technique for the deformation of block-structured grids occurring in simulations of fluid–structure interaction (FSI) problems relying on large-eddy simulation (LES). The proposed hybrid approach combines the advantages of the inverse distance weighting (IDW) interpolation with the simplicity and low computational effort of transfinite interpolation (TFI), while preserving the mesh quality in boundary layers. It is an improvement over the state-of-the-art currently in use. To reach this objective, in a first step, three elementary mesh deformation methods (TFI, IDW, and radial basis functions) are investigated based on several test cases of different complexities analyzing not only their capabilities but also their computational costs. That not only allows to point out the advantages of each method but also demonstrates their drawbacks. Based on these specific properties of the different methods, a hybrid methodology is suggested that splits the entire grid deformation into two steps: first, the movement of the block-boundaries of the block-structured grid and second, the deformation of each block of the grid. Both steps rely on different methodologies, which allows to work out the most appropriate method for each step leading to a reasonable compromise between the grid quality achieved and the computational effort required. Finally, a hybrid IDW-TFI methodology is suggested that best fits to the specific requirements of coupled FSI-LES applications. This hybrid procedure is then applied to a real-life FSI-LES case. Copyright © 2016 John Wiley & Sons, Ltd.
Organization Units (connected with the publication): Strömungsmechanik 
ISSN: 00295981
Publisher DOI: 10.1002/nme.5465
Appears in Collections:3 - Reported Publications

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