i

${\epsilon }^{\left(i\right)}$

$\Vert u^{\left(i\right)}-u^{\left(i-1\right)}\Vert$

N₃

N₄

N₅

N₆

N₇

$t^{\left(i\right)}/s$

3

4.5e−02

5.6e−02

178

3

1

0.08

7

9.1e−03

1.3e−02

4273

55

10

0.09

11

2.6e−03

3.8e−03

53,203

749

126

0.20

15

8.4e−04

1.3e−03

508,312

6715

1181

254

1.70

19

3.1e−04

4.9e−04

3,816,292

51,158

8526

1880

463

11.63

23

1.3e−04

2.0e−04

23,879,767

321,838

54,732

11,887

2892

67.07