A finite element method for nonlinear elliptic problems. (English) Zbl 1362.65126
Summary: We present a Galerkin method with piecewise polynomial continuous elements for fully nonlinear elliptic equations. A key tool is the discretization proposed in the authors’ paper [SIAM J. Sci. Comput. 33, No. 2, 786–801 (2011; Zbl 1227.65114)], allowing us to work directly on the strong form of a linear PDE. An added benefit to making use of this discretization method is that a recovered (finite element) Hessian is a byproduct of the solution process. We build on the linear method and ultimately construct two different methodologies for the solution of second order fully nonlinear PDEs. Benchmark numerical results illustrate the convergence properties of the scheme for some test problems as well as the Monge-Ampère equation and the Pucci equation.
MSC:
65N30 | Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs |
35J96 | Monge-Ampère equations |
35J60 | Nonlinear elliptic equations |
65N12 | Stability and convergence of numerical methods for boundary value problems involving PDEs |