High-Order Compact Difference Scheme and Multigrid Method for Solving the 2D Elliptic Problems

Table 6

Number of multigrid V(2,2) iterations and CPU time of the CDS and the FOC scheme for Problem 3.

Re	=1/64				=1/128				=1/256
	CDS		FOC		CDS		FOC		CDS		FOC
	Num	CPU	Num	CPU	Num	CPU	Num	CPU	Num	CPU	Num	CPU
1	8	0.16	7	0.17	9	0.41	7	0.45	9	1.50	7	1.59
10	8	0.16	7	0.17	8	0.38	7	0.44	8	1.36	7	1.56
10^2	6	0.14	7	0.17	6	0.32	7	0.42	6	1.06	7	1.55
10^3	-	-	5	0.16	-	-	6	0.41	-	-	7	1.56
10^4	-	-	39	0.44	-	-	27	1.11	-	-	16	2.92
10^5	-	-	296	2.39	-	-	416	14.31	-	-	205	31.22
10^6	-	-	325	2.56	-	-	1096	37.34	-	-	2949	456.2