2 research outputs found
Approximation Properties of a Gradient Recovery Operator Using a Biorthogonal System
A gradient recovery operator based on projecting the discrete gradient onto
the standard finite element space is considered. We use an oblique projection,
where the test and trial spaces are different, and the bases of these two
spaces form a biorthogonal system. Biorthogonality allows efficient computation
of the recovery operator.We analyse the approximation properties of the
gradient recovery operator
Approximation Properties of a Gradient Recovery Operator Using a Biorthogonal System
A gradient recovery operator based on projecting the discrete gradient onto the standard finite element space is considered. We use an oblique projection, where the test and trial spaces are different, and the bases of these two spaces form a biorthogonal system. Biorthogonality allows efficient computation of the recovery operator. We analyze the approximation properties of the gradient recovery operator. Numerical results are presented in the two-dimensional case