| Cells | h | hu | ||
| L1 error | Order | L1 error | Order | |
| 10 | 1.0857E−01 |
| 6.0932E−01 |
|
| 20 | 2.1038E−02 | 2.37 | 1.3431E−02 | 2.18 |
| 40 | 3.2465E−03 | 2.70 | 3.2804E−03 | 2.03 |
| 80 | 5.6119E−04 | 2.53 | 4.5159E−03 | 2.86 |
| 160 | 3.5251E−05 | 3.99 | 2.9981E−04 | 3.91 |
| 320 | 1.4480E−06 | 4.61 | 1.2316E−05 | 4.61 |
| 640 | 4.5688E−08 | 4.99 | 3.8618E−07 | 5.00 |
| 1280 | 1.5081E−09 | 4.92 | 1.2748E−08 | 4.92 |