N_t

10

20

30

40

50

60

70

80

90

mean

L2_error_u

0.40%

0.31%

0.27%

0.27%

0.32%

0.27%

0.28%

0.33%

0.36%

0.31%

L2_error_v

1.29%

0.91%

0.89%

0.91%

0.80%

0.79%

0.83%

0.82%

1.13%

0.93%

L2_error_p

1.32%

1.04%

1.03%

1.23%

1.31%

0.97%

1.35%

1.25%

1.53%

1.23%