Table 2.

Characteristics of the four grid systems for mesh independence test.

Grid system	Total mesh no.	Mesh no. before bend	Mesh no. in bend	Mesh no. behind bend
System 1	240 000	120 × 750	120 × 350	120 × 900
System 2	85 400	70 × 460	70 × 220	70 × 540
System 3	57 884	58 × 380	58 × 168	58 × 450
System 4	31 500	45 × 270	45 × 130	45 × 300