A moving mesh finite element method for Bernoulli free boundary problems
<|reference_start|>A moving mesh finite element method for Bernoulli free boundary problems: A moving mesh finite element method is studied for the numerical solution of Bernoulli free boundary problems. The method is based on the pseudo-transient continuation with which a moving boundary problem is constructed and its steady-state solution is taken as the solution of the underlying Bernoulli free boundary problem. The moving boundary problem is solved in a split manner at each time step: the moving boundary is updated with the Euler scheme, the interior mesh points are moved using a moving mesh method, and the corresponding initial-boundary value problem is solved using the linear finite element method. The method can take full advantages of both the pseudo-transient continuation and the moving mesh method. Particularly, it is able to move the mesh, free of tangling, to fit the varying domain for a variety of geometries no matter if they are convex or concave. Moreover, it is convergent towards steady state for a broad class of free boundary problems and initial guesses of the free boundary. Numerical examples for Bernoulli free boundary problems with constant and non-constant Bernoulli conditions and for nonlinear free boundary problems are presented to demonstrate the accuracy and robustness of the method and its ability to deal with various geometries and nonlinearities.<|reference_end|>
@article{shen2024a,
    title={A moving mesh finite element method for Bernoulli free boundary problems},
    author={Jinye Shen, Heng Dai, and Weizhang Huang},
    journal={arXiv preprint arXiv:2404.04418},
    year={2024},
    archivePrefix={arXiv},
    eprint={2404.04418},
    primaryClass={math.NA cs.NA}
}