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作者单位:Harald Garcke (1) Claudia Hecht (1)
1. Fakultät für Mathematik, Universität Regensburg, 93040, Regensburg, Germany
刊物类别:Mathematics and Statistics
刊物主题:Mathematics Calculus of Variations and Optimal Control Systems Theory and Control Mathematical and Computational Physics Mathematical Methods in Physics Numerical and Computational Methods
出版者:Springer New York
ISSN:1432-0606
文摘
In this paper we introduce a new formulation for shape optimization problems in fluids in a diffuse interface setting that can in particular handle topological changes. By adding the Ginzburg–Landau energy as a regularization to the objective functional and relaxing the non-permeability outside the fluid region by introducing a porous medium approach we hence obtain a phase field problem where the existence of a minimizer can be guaranteed. This problem is additionally related to a sharp interface problem, where the permeability of the non-fluid region is zero. In both the sharp and the diffuse interface setting we can derive necessary optimality conditions using only the natural regularity of the minimizers. We also pass to the limit in the first order conditions. Keywords Shape and topology optimization Phase field method Diffuse interfaces Stokes flow Fictitious domain