Garcke, Harald and Hecht, Claudia and Hinze, Michael and Kahle, Christian (2015) NUMERICAL APPROXIMATION OF PHASE FIELD BASED SHAPE AND TOPOLOGY OPTIMIZATION FOR FLUIDS. SIAM JOURNAL ON SCIENTIFIC COMPUTING, 37 (4). A1846-A1871. ISSN 1064-8275, 1095-7197
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We consider the problem of finding optimal shapes of fluid domains. The fluid obeys the Navier-Stokes equations. Inside a holdall container we use a phase field approach using diffuse interfaces to describe the domain of free flow. We formulate a corresponding optimization problem where flow outside the fluid domain is penalized. The resulting formulation of the shape optimization problem is shown to be well-posed, hence there exists a minimizer, and first order optimality conditions are derived. For the numerical realization we introduce a mass conserving gradient flow and obtain a Cahn-Hilliard type system, which is integrated numerically using the finite element method. An adaptive concept using reliable, residual based error estimation is exploited for the resolution of the spatial mesh. The overall concept is numerically investigated and comparison values are provided.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NAVIER-STOKES EQUATIONS; FINITE-ELEMENT METHODS; FLOW; ALGORITHM; DESIGN; shape optimization; topology optimization; diffuse interfaces; Cahn-Hilliard; Navier-Stokes; adaptive meshing |
| Subjects: | 500 Science > 510 Mathematics |
| Divisions: | Mathematics > Prof. Dr. Harald Garcke |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Jul 2019 13:50 |
| Last Modified: | 29 Jul 2019 13:50 |
| URI: | https://pred.uni-regensburg.de/id/eprint/6205 |
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