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Overlapping Grids in the DLR THETA Code

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New Results in Numerical and Experimental Fluid Mechanics IX

Part of the book series: Notes on Numerical Fluid Mechanics and Multidisciplinary Design ((NNFM,volume 124))

Abstract

There is an increasing interest in flow simulations in configurations where parts are moving relatively to each other. A general approach to this problem is the use of overlapping grids, often called Chimera-technique. An incompressible flow solver based on a projection scheme with a fast multi-grid method for the pressure correction equation requires an implicit coupling between the grids on all levels of the multi-grid hierarchy in order to retain the good convergence properties. The efficient implementation of the overlapping grid technique in the DLR THETA code and its validation are presented in this chapter.

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Acknowledgments

This work was partially supported by the Forschungsvereinigung für Luft- und Trocknungstechnik e.V. (FLT). Furthermore we want to thank Dr. Markus Lambert for the preparation of the implementation of the Chimera-technique in the DLR THETA code.

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Correspondence to Roland Kessler .

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Kessler, R., Löwe, J. (2014). Overlapping Grids in the DLR THETA Code. In: Dillmann, A., Heller, G., Krämer, E., Kreplin, HP., Nitsche, W., Rist, U. (eds) New Results in Numerical and Experimental Fluid Mechanics IX. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 124. Springer, Cham. https://doi.org/10.1007/978-3-319-03158-3_43

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  • DOI: https://doi.org/10.1007/978-3-319-03158-3_43

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