Computational algorithms for tracking dynamic fluid-structure interfaces in embedded boundary methods

SUMMARY A robust, accurate, and computationally efficient interface tracking algorithm is a key component of an embedded computational framework for the solution of fluid–structure interaction problems with complex and deformable geometries. To a large extent, the design of such an algorithm has foc...

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Vydané v:	International journal for numerical methods in fluids Ročník 70; číslo 4; s. 515 - 535
Hlavní autori:	Wang, K., Grétarsson, J., Main, A., Farhat, C.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Chichester Blackwell Publishing Ltd 10.10.2012 Wiley
Predmet:	Computational methods in fluid dynamics embedded boundary method Eulerian Exact sciences and technology Fluid dynamics fluid-structure interaction Fundamental areas of phenomenology (including applications) immersed boundary method interface tracking Physics Solid mechanics Structural and continuum mechanics Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...) Computational fluid dynamics interface tracking Fluid structure interaction Immersed boundary method Algorithm Modeling embedded boundary method fluid-structure interaction Three dimensional flow Flexible structure Eulerian Numerical simulation Aeroelasticity
ISSN:	0271-2091, 1097-0363
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Shrnutí:	SUMMARY A robust, accurate, and computationally efficient interface tracking algorithm is a key component of an embedded computational framework for the solution of fluid–structure interaction problems with complex and deformable geometries. To a large extent, the design of such an algorithm has focused on the case of a closed embedded interface and a Cartesian computational fluid dynamics grid. Here, two robust and efficient interface tracking computational algorithms capable of operating on structured as well as unstructured three‐dimensional computational fluid dynamics grids are presented. The first one is based on a projection approach, whereas the second one is based on a collision approach. The first algorithm is faster. However, it is restricted to closed interfaces and resolved enclosed volumes. The second algorithm is therefore slower. However, it can handle open shell surfaces and underresolved enclosed volumes. Both computational algorithms exploit the bounding box hierarchy technique and its parallel distributed implementation to efficiently store and retrieve the elements of the discretized embedded interface. They are illustrated, and their respective performances are assessed and contrasted, with the solution of three‐dimensional, nonlinear, dynamic fluid–structure interaction problems pertaining to aeroelastic and underwater implosion applications. Copyright © 2012 John Wiley & Sons, Ltd. A robust, accurate, and computationally efficient interface tracking algorithm is a key component of an embedded computational framework for the solution of fluid–structure interaction problems with complex and deformable geometries.
Bibliografia:	ark:/67375/WNG-59STX0S5-M istex:622FD4A6676D26989CECE7CB02AF128DDC416BB5 ArticleID:FLD3659
ISSN:	0271-2091 1097-0363
DOI:	10.1002/fld.3659