One-step Taylor-Galerkin methods for convection-diffusion problems

Third and fourth order Taylor-Galerkin schemes have shown to be efficient. finite element schemes for the numerical simulation of time-dependent convective transport problems. By contrast, the application of higher-order Taylor-Galerkin schemes to mixed problems describing transient transport by both convection and diffusion appears to be much more difficult. In this paper we develop two new Taylor-Galerkin schemes maintaining the accuracy properties and improving the stability restrictions in convection-diffusion. We also present an efficient algorithm for solving the resulting system of the finite element method. Finally we present two numerical simulations that confirm the properties of the methods. (C) 2006 Elsevier B.V. All rights reserved.