Table 1.

The error and order at $\mathit{t}\mathbf{=}\mathbf{0.4}\mathit{s}\mathbf{,}\mathbf{0.7}\mathit{s}\mathbf{,}\mathbf{1.0}\mathit{s}$ , respectively.

${\mathit{N}}^{\mathbf{2}}$	Error	Order	Error	Order	Error	Order
2 × 2	1.0844	-	1.5356	-	1.8760	-
4 × 4	0.3886	1.4805	0.4826	1.6699	0.6084	1.6246
8 × 8	0.0937	2.0522	0.1327	1.8627	0.1607	1.9207
16 × 16	0.0260	1.8495	0.0319	2.0565	0.0397	2.0172
32 × 32	0.0058	2.1644	0.0082	1.9599	0.0098	2.0183