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2015 | OriginalPaper | Buchkapitel

Creating Free-Surface Flow Grids with Automatic Grid Refinement

verfasst von : Jeroen Wackers, Ganbo Deng, Emmanuel Guilmineau, Alban Leroyer, Patrick Queutey, Michel Visonneau

Erschienen in: New Challenges in Grid Generation and Adaptivity for Scientific Computing

Verlag: Springer International Publishing

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Abstract

The objective of this work is to create grids for free-surface water flow simulation entirely with automatic grid refinement. It is shown why it is necessary to refine the mesh iteratively as the solution converges and why refinement and derefinement of hexahedral cells must be treated anisotropically.The proposed refinement criterion is a combination of the pressure Hessian with refinement at the free surface, in order to capture the flow which drives the surface motion and the position of the surface itself. Smoothing is needed in the computation of the Hessian in order to remove oscillations in the pressure, the pressure Hessian is extrapolated through the free surface to remove its discontinuity there.Two test cases confirm that effective fine meshes for wave computation can be created with the proposed automatic refinement procedure.

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Metadaten
Titel
Creating Free-Surface Flow Grids with Automatic Grid Refinement
verfasst von
Jeroen Wackers
Ganbo Deng
Emmanuel Guilmineau
Alban Leroyer
Patrick Queutey
Michel Visonneau
Copyright-Jahr
2015
DOI
https://doi.org/10.1007/978-3-319-06053-8_15