k = Δ t

l 2 error norm

Max. abs. error

1 × 10−7

3.80932 × 106

8.50023 × 10−6

2 × 10−7

7.62879 × 106

1.70714 × 105

3 × 10−7

1.14465 × 105

2.56274 × 105

4 × 10−7

1.52661 × 105

3.41928 × 105

5 × 10−7

1.90832 × 105

4.27431 × 105

6 × 10−7

2.29021 × 105

5.13026 × 105

7 × 10−7

2.67184 × 105

5.98472 × 105

8 × 10−7

3.05365 × 105

6.84009 × 105

9 × 10−7

3.43519 × 105

7.69394 × 105

0.000001

3.81692 × 105

8.54876 × 105