Advances in Continuous and Discrete Models

Theory and Modern Applications

Table 7 Comparison of the iteration number and computational cost (WU) on different grid level of MG and EXFMG methods for Example 5.1

From: An extrapolation full multigrid algorithm combined with fourth-order compact scheme for convection–diffusion equations

j	\(\Omega _{j}\)	MG		EXFMG
j	\(\Omega _{j}\)	Iter	WU	Iter	WU
2	64 × 64	1	0.02	1	0.02
3	128 × 128	9	0.70	10	0.78
4	256 × 256	9	2.95	8	2.63
5	512 × 512	9	11.95	7	9.30
6	1024 × 1024	9	47.95	5	26.64

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