A new staggered scheme for fluid–structure interaction

Dettmer, Wulf G.; Perić, D.

doi:10.1002/nme.4370

Cited by 81 publications

(93 citation statements)

References 43 publications

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“…Comprehensive overviews are given in the work of Wall (1999) and Steindorf (2002). More recent developments can be fond in Bungartz and Schäfer (2006), Bungartz et al (2012) or Dettmer and Perić (2013). Coupling Strategies.…”

Section: Computational Modellingmentioning

confidence: 97%

Modelling of Fluid-Structure Interaction – Effects of Added Mass, Damping and Stiffness

Zilian

2014

Dynamics of Mechanical Systems With Variable Mass

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Fluid-flow around mechanical structures can sometimes lead to catastrophic failures. Improved modelling of fluid/structure interaction is required for safety and mechanical considerations. In this contribution, concepts for modelling the interaction of structures and fluids are presented. Starting from excitation mechanisms and associated classifications, various model depth approaches are compared. Among them, the use of added coefficients for quasisteady problems is discussed. On the basis of potential flow theory, different approaches for determining fluid-induced additional mass are established and illustrated using an analytical example. Given the limitations of simplifying the engineering models, the second part of the paper provides a brief overview on computational methods for fluid-structure interaction and presents a monolithic modelling approach using space-time finite elements for discretisation of both fluid and structure. Applications from aero-and hydroelasticity show the applicability of computational methods for problems involving flow-induced added mass, damping, and stiffness.

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Section: Computational Modellingmentioning

confidence: 97%

Modelling of Fluid-Structure Interaction – Effects of Added Mass, Damping and Stiffness

Zilian

2014

Dynamics of Mechanical Systems With Variable Mass

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“…Due to its simple and modular implementation, this is widely used in computational aeroelasticity, where the coupled dynamics are often mostly determined by the vibrations characteristics of the structure [3,[36][37][38]. However, this scheme may be unstable or inaccurate in certain cases, due to its high dependency on the density ratio ρ s /ρ f and the compressibility of the flow [35,39,40].…”

Section: Time Couplingmentioning

confidence: 99%

Assessment of the Fluid-Structure Interaction Capabilities for Aeronautical Applications of the Open-Source Solver Su2.

Sánchez¹,

Kline²,

Thomas³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Abstract. We report on an international effort to develop an open-source computational environment for high-fidelity fluid-structure interaction analysis. In particular, we will focus on verification of the implementation for application in computational aeroelasticity. The capabilities of the SU2 code for aeroelastic analysis have been further enhanced both by developing natively embedded tools for the study of largely deformable solids, and by wrapping it using Python tools for an improved communication with external solvers. Both capabilities will be demonstrated on relevant test cases, including rigid-airfoil solutions with indicial functions, the Isogai Wing Section, test cases from the AIAA 2nd Aeroelastic Prediction Workshop, and the vortex-induced vibrations of a flexible cantilever in the wake of a square cylinder. Results show very good performance both in terms of accuracy and computational efficiency. The modularity and versatility of the baseline suite allows for a flexible framework for multidisciplinary computational analysis. The software libraries have been freely shared with the community to encourage further engagement in the improvement, validation and further development of this open-source project.

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“…al, 32 or the works of Dettmer and Peric on a second-order staggered algorithm. 33 Despite these efforts, some instabilities and inaccuracies are inherent to loosely-coupled schemes and have been reported throughout the literature. In particular, the stability of these schemes is highly dependent on the density ratio ρ s /ρ f and the compressibility of the flow.…”

Section: Iid Time Couplingmentioning

confidence: 99%

“…In particular, the stability of these schemes is highly dependent on the density ratio ρ s /ρ f and the compressibility of the flow. 26,33,34 Incompressible flows combined with low density ratios generally require strongly coupled solvers due to the added-mass effect. 33,35 Moreover, thin-walled structures which undergo large deformations are also very sensitive to the quality of the solution scheme.…”

Section: Iid Time Couplingmentioning

confidence: 99%

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Towards a Fluid-Structure Interaction Solver for Problems with Large Deformations Within the Open-Source SU2 Suite

Sánchez

Palacios

Economon

et al. 2016

57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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This paper describes a new framework for Fluid-Structure Interaction (FSI) modelling within the open-source code SU2. SU2 has been developed to solve complex, multi-physics problems described by Partial Differential Equations (PDEs), with an emphasis on problems involving aerodynamic shape optimization. Due to its modularity, the code provides an appropriate infrastructure for the solution of physical problems in several disciplines. This work provides SU2 with new tools that expand its capabilities in the fields of structural analysis and FSI. The focus will be on geometrically-nonlinear deformable solids in low-speed external flows.A Finite Element (FE) structural solver, able to deal with geometrical and material non-linearities in a static and a dynamic setting, has been built within the framework of SU2 alongside the existing solvers. Following the original object-oriented architecture in C++, a new structure compliant with the CFD solver has been developed. These new features will serve as a basis for future developments of FE-based strategies for the solution of PDEs. The structural solver has been coupled with the original fluid solver in SU2 using a partitioned approach. The structure of the code was fully recast to allow analysis across multiple zones and physical problems, currently limited to problems involving fluid and structural analysis. Both loosely-and strongly-coupled strategies are available for the solution of the coupled FSI problem.Finally, the validity of the implementations is assessed by studying the behavior of a rigid square with a flexible cantilever at low Reynolds number. The results obtained demonstrate the capabilities of these new developments and further address the physics behind this benchmark problem. * Graduate Student, Department of Aeronautics, 363A Roderic Hill Building; r.sanchez-fernandez14@imperial.ac.uk. AIAA Student Member.

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A new staggered scheme for fluid–structure interaction

Cited by 81 publications

References 43 publications

Modelling of Fluid-Structure Interaction – Effects of Added Mass, Damping and Stiffness

Modelling of Fluid-Structure Interaction – Effects of Added Mass, Damping and Stiffness

Assessment of the Fluid-Structure Interaction Capabilities for Aeronautical Applications of the Open-Source Solver Su2.

Towards a Fluid-Structure Interaction Solver for Problems with Large Deformations Within the Open-Source SU2 Suite

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