Isogeometric residual minimization (iGRM) for non-stationary Stokes and Navier–Stokes problems

نویسندگان

چکیده

We show that it is possible to obtain a linear computational cost FEM-based solver for non-stationary Stokes and Navier-Stokes equations. Our method employs technique developed by Guermond Minev, which consists of singular perturbation plus splitting scheme. While the time-integration schemes are implicit, we use finite elements discretize spatial counterparts. At each time-step, solve PDE having weak-derivatives in one direction only (which allows cost), at expense handling strong second-order derivatives previous time step solution, on right-hand side these PDEs. This motivates smooth functions such as B-splines. For high Reynolds numbers, some PDEs become unstable. To deal robustly with instabilities, propose residual minimization technique. test our problems manufactured solutions, well cavity flow problem.

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ژورنال

عنوان ژورنال: Computers & mathematics with applications

سال: 2021

ISSN: ['0898-1221', '1873-7668']

DOI: https://doi.org/10.1016/j.camwa.2020.11.013