Table 2 Calculation results of different meshes for the three-dimensional layered model.

From: Hybrid mesh for magnetotelluric forward modeling based on the finite element method

 

Mesh property

NE

DoF

NNZ

Time (min)

MAE (\(\%\))

Apparent resistivity

Phase

Mesh A

Hybrid mesh (First order)

11,014

18,234

555,213

1.783

5.462

2.371

Hybrid mesh (Second order)

11,014

112,082

8,786,634

8.833

0.2679

0.104

Mesh B1

Tetrahedral mesh

10,079

81,616

5,101,464

5.25

62.396

19.412

Mesh B2

185,593

1,439,313

92,848,086

42.133

2.765

3.802

Mesh B3

1,235,632

9,513,920

616,910,456

548.15

0.966

2.143

  1. The number of element (NE) represents the total number of all elements in a hybrid or tetrahedral mesh. The DoF number and number of nonzeros (NNZ) reflect the basic situation of the FE system matrix. Based on the semianalytic solution, we use the MAE to measure the misfit of the results generated from different meshes. We provide the memory occupied by the four meshing calculations
  2. Significant values are in [bold].
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