Table 4: Convergence rate in space for (46) with and .

-norm -norm c. rate CPUT (seconds)

0.001 1/4 2.3325 3.1119 23.73
0.001 1/16 6.0836 8.1823 1.9272 26.29
0.001 1/32 1.5382 2.0870 1.9711 33.49
0.001 1/64 3.8569 5.2622 1.9877 41.68
0.001 1/128 9.6378 1.3189 1.9963 55.24