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Multi-Scale Anisotropic Mesh Adaptation for Time-Dependent Problems

Frédéric Alauzet 1 Adrien Loseille 1 Géraldine Olivier 1
1 Gamma3 - Automatic mesh generation and advanced methods
Inria Paris-Rocquencourt, ICD - Institut Charles Delaunay
Abstract : This paper deals with anisotropic mesh adaptation applied to unsteady inviscid CFD simulations. Anisotropic metric-based mesh adaptation is an efficient strategy to reduce the extensive CPU time currently required by time-dependent simulations from the perspective of performing this kind of computations on a daily basis in an industrial context. In this work, we detail the time-accurate extension of multi-scale anisotropic mesh adaptation for steady flows, i.e., a control of the interpolation error in Lp norm, to unsteady flows based on a space-time error analysis and an enhanced version of the fixed-point algorithm. We also show that each stage - remeshing, metric field computation, solution transfer, and flow solution - is important to design an efficient time-accurate anisotropic mesh adaptation process. The parallelization of the whole mesh adaptation platform is also discussed. The efficiency of the approach is emphasized on three-dimensional problems with convergence analysis and CPU data.
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https://hal.inria.fr/hal-01339326
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Submitted on : Wednesday, June 29, 2016 - 3:56:24 PM
Last modification on : Thursday, March 11, 2021 - 9:42:02 PM

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Frédéric Alauzet, Adrien Loseille, Géraldine Olivier. Multi-Scale Anisotropic Mesh Adaptation for Time-Dependent Problems. [Research Report] RR-8929, INRIA Saclay - Ile-de-France. 2016, pp.42. ⟨hal-01339326⟩

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