Fig. 2From: An introductory review of the thermal structure of subduction zones: II—numerical approach and validationFEM solution to 1D Poisson equation. a Approximate FEM solution obtained using a mesh of four P1 elements compared to analytical solution (black). Discrete values from the solution vector \({{\textbf{T}}}\) are shown in red circles. The interpolated approximate solution is shown by the green dashed line. b Same as a) but now for four P2 elementsBack to article page