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Table 2 Time and memory used in multi-order VFEM with GPML-II boundary conditions (Zhou et al. 2012)

From: Multi-order vector finite element modeling of 3D magnetotelluric data including complex geometry and anisotropy

Element Linear Quadratic Lagrangian
Grid \(N_\text{e}\) \(62\times 62\times 47\) \(26\times 26\times 20\) \(26\times 26\times 20\)
DoF 561,519 172,680 338,352
NNZE 9,291,615 6,979,448 17,158,968
Assembly time 184.55 s 389.12 s 770.37 s
Total time 8046.82 s 2603.16 s 3877.8 s
\(\epsilon ^{\text{avg}}_\rho\) \(12.77\%\) \(0.26\%\) \(0.22\%\)
\(\epsilon ^{\text{avg}}_\phi\) \(3.29\%\) \(2.3\%\) \(2.3\%\)
  1. Times are shown in seconds, and the memory is presented in terms of the number of elements \(N_\text{e}\), the number of unknowns (DoF) and the number of non-zero entries for the global array NNZE. Average errors are shown for resistivity \(\epsilon ^{\text{avg}}_\rho\), and for the phase \(\epsilon ^{\text{avg}}_\phi\)