Table 2.

Grid independence test.

Grid	Radial nodes	Angular nodes	Axial nodes	Total nodes	Tout	Ɛ with exp (%)2
1	22	40	100	512000	448.12	0.374
2	30	50	150	1275000	447.83	0.309
3	34	54	180	1846800	447.76	0.293
4	38	56	200	2120000	447.68	0.279
5	42	60	220	2642000	447.63	0.275
6	46	70	240	3220000	447.61	0.266