Mesh grid

21 * 21

21 * 41

41 * 41

41 * 51

41 * 81

51 * 51

51 * 81

81 * 81

Nu

5.0217

5.0617

4.9614

4.9647

4.9524

4.9670

4.9624

4.9618

Difference (%)

1.82

2.63

0.60

0.67

0.71

0.42

0.38

0

Time computing (min)

7

12

37

45

70

75

145

232