Table 4: Analysis results on the effect of the design variables on the pressure drop.

Level 1Level 2Level 3Level 4Deviation%Rank

−44.21−44.68−45.22−45.751.5495.71
−44.99−44.96−44.95−44.970.031.83
−44.99−44.95−44.97−44.960.042.52

Total1.61100