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A novel p-harmonic descent approach applied to fluid dynamic shape optimization
Citation Link: https://doi.org/10.15480/882.4030
Publikationstyp
Journal Article
Date Issued
2021-08-26
Sprache
English
Institut
TORE-DOI
Volume
64
Issue
6
Start Page
3489 - 3503
End Page
3489 - 3503
Citation
Structural and Multidisciplinary Optimization 64 (6): 3489-3503 (2021)
Publisher DOI
Scopus ID
ArXiv ID
Publisher
Springer
We introduce a novel method for the implementation of shape optimization for non-parameterized shapes in fluid dynamics applications, where we propose to use the shape derivative to determine deformation fields with the help of the p- Laplacian for p> 2. This approach is closely related to the computation of steepest descent directions of the shape functional in the W1,∞- topology and refers to the recent publication Deckelnick et al. (A novel W1,∞ approach to shape optimisation with Lipschitz domains, 2021), where this idea is proposed. Our approach is demonstrated for shape optimization related to drag-minimal free floating bodies. The method is validated against existing approaches with respect to convergence of the optimization algorithm, the obtained shape, and regarding the quality of the computational grid after large deformations. Our numerical results strongly indicate that shape optimization related to the W1,∞-topology—though numerically more demanding—seems to be superior over the classical approaches invoking Hilbert space methods, concerning the convergence, the obtained shapes and the mesh quality after large deformations, in particular when the optimal shape features sharp corners.
Subjects
Shape optimization
W1,∞-steepest descent
p-Laplace relaxation
Adjoint optimization
DDC Class
600: Technik
More Funding Information
Michael Hinze acknowledges support of the DFG Priority Programme 1962 with projekt P8 “A Non-Smooth Phase-Field Approach to Shape Optimization with Instationary Fluid Flow”.
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