A Mixed finite element method for the velocity-pseudostress formulation of the Oseen eigenvalue problem
<|reference_start|>A Mixed finite element method for the velocity-pseudostress formulation of the Oseen eigenvalue problem: In this paper, we introduce and analyze a mixed formulation for the Oseen eigenvalue problem by introducing the pseudostress tensor as a new unknown, allowing us to eliminate the fluid pressure. The well-posedness of the solution operator is established using a fixed-point argument. For the numerical analysis, we use the tensorial versions of Raviart-Thomas and Brezzi-Douglas-Marini elements to approximate the pseudostress, and piecewise polynomials for the velocity. Convergence and a priori error estimates are derived based on compact operator theory. We present a series of numerical tests in two and three dimensions to confirm the theoretical findings.<|reference_end|>
@article{lepe2024a,
    title={A Mixed finite element method for the velocity-pseudostress formulation
  of the Oseen eigenvalue problem},
    author={Felipe Lepe, Gonzalo Rivera, Jesus Vellojin},
    journal={arXiv preprint arXiv:2409.17314},
    year={2024},
    archivePrefix={arXiv},
    eprint={2409.17314},
    primaryClass={math.NA cs.NA}
}