A new error estimate for a fully finite element discretization scheme for parabolic equations using Crank-Nicolson method

Bradji, Abdallah, and Fuhrmann, Jürgen. "A new error estimate for a fully finite element discretization scheme for parabolic equations using Crank-Nicolson method." Mathematica Bohemica 139.2 (2014): 113-124. <http://eudml.org/doc/261890>.

@article{Bradji2014,
abstract = {Finite element methods with piecewise polynomial spaces in space for solving the nonstationary heat equation, as a model for parabolic equations are considered. The discretization in time is performed using the Crank-Nicolson method. A new a priori estimate is proved. Thanks to this new a priori estimate, a new error estimate in the discrete norm of $\mathcal \{W\}^\{1,\infty \}(\mathcal \{L\}^2)$ is proved. An $\mathcal \{L\}^\infty (\mathcal \{H\}^1)$-error estimate is also shown. These error estimates are useful since they allow us to get second order time accurate approximations for not only the exact solution of the heat equation but also for its first derivatives (both spatial and temporal). Even the proof presented in this note is in some sense standard but the stated $\mathcal \{W\}^\{1,\infty \}(\mathcal \{L\}^2)$-error estimate seems not to be present in the existing literature of the Crank-Nicolson finite element schemes for parabolic equations.},
author = {Bradji, Abdallah, Fuhrmann, Jürgen},
journal = {Mathematica Bohemica},
keywords = {parabolic equation; finite element method; Crank-Nicolson method; new error estimate; heat equation; finite element method; Crank-Nicolson method; a priori error estimate; semidiscretization},
language = {eng},
number = {2},
pages = {113-124},
publisher = {Institute of Mathematics, Academy of Sciences of the Czech Republic},
title = {A new error estimate for a fully finite element discretization scheme for parabolic equations using Crank-Nicolson method},
url = {http://eudml.org/doc/261890},
volume = {139},
year = {2014},
}

TY - JOUR
AU - Bradji, Abdallah
AU - Fuhrmann, Jürgen
TI - A new error estimate for a fully finite element discretization scheme for parabolic equations using Crank-Nicolson method
JO - Mathematica Bohemica
PY - 2014
PB - Institute of Mathematics, Academy of Sciences of the Czech Republic
VL - 139
IS - 2
SP - 113
EP - 124
AB - Finite element methods with piecewise polynomial spaces in space for solving the nonstationary heat equation, as a model for parabolic equations are considered. The discretization in time is performed using the Crank-Nicolson method. A new a priori estimate is proved. Thanks to this new a priori estimate, a new error estimate in the discrete norm of $\mathcal {W}^{1,\infty }(\mathcal {L}^2)$ is proved. An $\mathcal {L}^\infty (\mathcal {H}^1)$-error estimate is also shown. These error estimates are useful since they allow us to get second order time accurate approximations for not only the exact solution of the heat equation but also for its first derivatives (both spatial and temporal). Even the proof presented in this note is in some sense standard but the stated $\mathcal {W}^{1,\infty }(\mathcal {L}^2)$-error estimate seems not to be present in the existing literature of the Crank-Nicolson finite element schemes for parabolic equations.
LA - eng
KW - parabolic equation; finite element method; Crank-Nicolson method; new error estimate; heat equation; finite element method; Crank-Nicolson method; a priori error estimate; semidiscretization
UR - http://eudml.org/doc/261890
ER -