Staggered-Grid Finite Difference Method with Variable-Order Accuracy for Porous Media

Table 4

CPU time of SFD modeling for different models, whose parameters are shown in Table 1. The difference of these models is the thickness of Layer 3 and Layer 6. Values of 𝑀=6,4,4,4,4,3 are used for six different velocities.

Thickness (m)		CPU time of 1000 recursion times (s)
Layer 3	Layer 6	Fixed	Variable
280	240	692	606
40	240	688	572
40	440	698	558