
arXiv: 2205.01912
This work develops an algorithm for PDE-constrained shape optimization based on Lipschitz transformations. Building on previous work in this field, the $p$-Laplace operator is utilized to approximate a descent method for Lipschitz shapes. In particular, it is shown how geometric constraints are algorithmically incorporated avoiding penalty terms by assigning them to the subproblem of finding a suitable descent direction. A special focus is placed on the scalability of the proposed methods for large scale parallel computers via the application of multigrid solvers. The preservation of mesh quality under large deformations, where shape singularities have to be smoothed or generated within the optimization process, is also discussed. It is shown that the interaction of hierarchically refined grids and shape optimization can be realized by the choice of appropriate descent directions. The performance of the proposed methods is demonstrated for energy dissipation minimization in fluid dynamics applications.
PDEs in connection with control and optimization, Numerical optimization and variational techniques, Multigrid methods; domain decomposition for boundary value problems involving PDEs, parallel computing, Navier-Stokes equations for incompressible viscous fluids, Parallel numerical computation, PDE constrained optimization (numerical aspects), geometric multigrid, Mesh generation, refinement, and adaptive methods for boundary value problems involving PDEs, Optimization of shapes other than minimal surfaces, Optimization and Control (math.OC), shape optimization, FOS: Mathematics, Lipschitz transformations, Navier-Stokes equations, Mathematics - Optimization and Control
PDEs in connection with control and optimization, Numerical optimization and variational techniques, Multigrid methods; domain decomposition for boundary value problems involving PDEs, parallel computing, Navier-Stokes equations for incompressible viscous fluids, Parallel numerical computation, PDE constrained optimization (numerical aspects), geometric multigrid, Mesh generation, refinement, and adaptive methods for boundary value problems involving PDEs, Optimization of shapes other than minimal surfaces, Optimization and Control (math.OC), shape optimization, FOS: Mathematics, Lipschitz transformations, Navier-Stokes equations, Mathematics - Optimization and Control
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