Antidissipative Numerical Schemes for the Anisotropic Diffusion Operator in Problems for the Allen-cahn Equation

This contribution discusses two attitudes to artificial dissipation reduction in numerical schemes for solving initial boundary value problems for the Allen-Cahn equation with anisotropy incorporated into the diffusion operator. In the first case, a weighted first order finite difference scheme is used for spatial discretization of the anisotropic texture diffusion problem in 2D, designed for vector field visualization. In the second case, a higher order finite volume scheme is used for the texture diffusion problem in 3D, applied in a MR tractography algorithm. The anisotropy of the diffusion is controlled by the diffusion tensor field. For both problems, comparisons with standard low order schemes are given in the form of pictures, together with remarks on convergence analysis results.