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Keywords: fluid-structure interaction, p-finite element method, high-order finite elements, lattice Boltzmann.

Summary

In the recent years we investigated the validity and efficiency of coupling high order solids to the lattice Boltzmann method. This paper gives an overview of the results achieved.

The methodology applied can be classified as a discrete forcing approach of an embedded domain method. Here, the fluid-structure interface is represented as a sharp interface and the boundary conditions are directly imposed on the structure and on the fluid at this discrete interface. As such, this contribution is a continuation of the work presented in [1]. In [1], this methodology was laid out in detail, benchmarked and verified against the two-dimensional, numerical examples. By contrast, the present paper shows that the method can reproduce the experimental results described in [2] where a detailed comparison of the results obtained in comparison to the application of other methods is presented as well.

Additionally, the methods applied in two dimensions are now extended to three dimensions and verified against three-dimensional benchmarks. It also turned out that this setup is well suited for the simulation of transient bidirectional fluid-structure interaction problems with very large structural deflections.

In the course of this work we experienced clear advantages over conventional methods as well as some drawbacks which are communicated in this contribution. Further, the applicability of the setup to problems in civil engineering such as the fully three dimensional, turbulent computation of a bridge in a storm is pointed out.

References

1: S. Kollmannsberger, S. Geller, A. Düster, J. Tölke, C. Sorger, M. Krafczyk, E. Rank, "Fixed-grid Fluid-Structure interaction in two dimensions based on a partitioned Lattice Boltzmann and p-FEM approach", International Journal for Numerical Methods in Engineering, 79(7), 817-845, 2009. doi:10.1002/nme.2581
2: J.P. Gomes, H. Lienhart, "Experimental study in a fluid-structure interaction reference test case", Lecture Notes in Computational Science and Engineering: Fluid-Structure Interaction, Springer, 2010.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 94 PROCEEDINGS OF THE SEVENTH INTERNATIONAL CONFERENCE ON ENGINEERING COMPUTATIONAL TECHNOLOGY Edited by: Paper 160 Modelling Fluid-Structure Interaction with High Order Solids and Lattice Boltzmann S. Kollmannsberger¹, A. Düster², E. Rank¹, S. Geller³ and M. Krafczyk³ ¹Chair for Computation in Engineering, TU München, Germany ²Numerical Structural Analysis with Application in Ship Technology, TU Hamburg-Harburg, Germany ³Institute for Computational Modeling in Civil Engineering, TU Braunschweig, Germany doi:10.4203/ccp.94.160 purchase the full-text of this paper Full Bibliographic Reference for this paper , "Modelling Fluid-Structure Interaction with High Order Solids and Lattice Boltzmann", in , (Editors), "Proceedings of the Seventh International Conference on Engineering Computational Technology", Civil-Comp Press, Stirlingshire, UK, Paper 160, 2010. doi:10.4203/ccp.94.160 Keywords: fluid-structure interaction, p-finite element method, high-order finite elements, lattice Boltzmann. Summary In the recent years we investigated the validity and efficiency of coupling high order solids to the lattice Boltzmann method. This paper gives an overview of the results achieved. The methodology applied can be classified as a discrete forcing approach of an embedded domain method. Here, the fluid-structure interface is represented as a sharp interface and the boundary conditions are directly imposed on the structure and on the fluid at this discrete interface. As such, this contribution is a continuation of the work presented in [1]. In [1], this methodology was laid out in detail, benchmarked and verified against the two-dimensional, numerical examples. By contrast, the present paper shows that the method can reproduce the experimental results described in [2] where a detailed comparison of the results obtained in comparison to the application of other methods is presented as well. Additionally, the methods applied in two dimensions are now extended to three dimensions and verified against three-dimensional benchmarks. It also turned out that this setup is well suited for the simulation of transient bidirectional fluid-structure interaction problems with very large structural deflections. In the course of this work we experienced clear advantages over conventional methods as well as some drawbacks which are communicated in this contribution. Further, the applicability of the setup to problems in civil engineering such as the fully three dimensional, turbulent computation of a bridge in a storm is pointed out. References 1 S. Kollmannsberger, S. Geller, A. Düster, J. Tölke, C. Sorger, M. Krafczyk, E. Rank, "Fixed-grid Fluid-Structure interaction in two dimensions based on a partitioned Lattice Boltzmann and p-FEM approach", International Journal for Numerical Methods in Engineering, 79(7), 817-845, 2009. doi:10.1002/nme.2581 2 J.P. Gomes, H. Lienhart, "Experimental study in a fluid-structure interaction reference test case", Lecture Notes in Computational Science and Engineering: Fluid-Structure Interaction, Springer, 2010. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £125 +P&P)
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