Table 2.

Numerical sensitivity studies—values show the maximum relative error for velocity in the z-direction for the three axial planes analyzed (Fig. 2)

Sensitivity study	Parameter to study	Constant parameters	Maximum error (%)
Grid size	MS = 2 mm, GS = 0.06 M, PS = 0.1 mm, PN = 3	TS = CT/84	68
	MS = 1 mm, GS = 0.6 M, PS = 0.1 mm PN = 3	CN = 2	15.7
	MS = 0.5 mm, GS = 3.7 M, PS = 0.05 mm PN = 4		4.4
MS = 0.25 mm, GS = 29.5 M, PS = 0.025 mm, PN = 6
Time Step Size	CT/42	GS = 3.7 M	51
	CT/84	CN = 2	18
	CT/168		2.7
CT/336
Cycle number	1	GS = 3.7 M	16.1
	2	TS = CT/84	3.7
	3		3.06
4

GS = grid size, PS = prism size, PN = prism number, MS = mesh size, CN = cycle number, M = million cells, CT = cycle time in seconds, TS = time step size