Abstract
We present an application of multigrid algorithms to a Discontinuous Galerkin discretization of the 3D Reynolds-averaged Navier–Stokes equations in combination with a kω turbulence model. Based on either lower order discretizations or agglomerated coarse meshes the resulting algorithms can be characterized as p- or h-multigrid, respectively. Linear and nonlinear multigrid algorithms are applied to a 3D numerical test case, namely the VFE-2 delta-wing with rounded leading edge. All presented algorithms are compared to a strongly implicit single grid solver in terms of run time behavior and nonlinear iterations.
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Acknowledgements
The authors acknowledge the financial support of both the BMBF joint research project DGHPOPT (Förderkennzeichen: 05M10CLA) and the EC funded IDIHOM project [10].
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Wallraff, M., Leicht, T. (2014). 3D Application of Higher Order Multigrid Algorithms for a RANS-kω DG-Solver. In: Abgrall, R., Beaugendre, H., Congedo, P., Dobrzynski, C., Perrier, V., Ricchiuto, M. (eds) High Order Nonlinear Numerical Schemes for Evolutionary PDEs. Lecture Notes in Computational Science and Engineering, vol 99. Springer, Cham. https://doi.org/10.1007/978-3-319-05455-1_5
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DOI: https://doi.org/10.1007/978-3-319-05455-1_5
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