Solving Reaction-Diffusion and Advection Problems with Richardson Extrapolation

Table 2

Computational times of the diffusion problem without and with passive/active Richardson extrapolation.

Time step	Computational time (s)
	Euler	Passive Richardson	Active Richardson
0.20	0.05	0.12	0.14
0.17	0.07	0.13	0.17
0.14	0.08	0.15	0.20
0.13	0.08	0.18	0.23
0.11	0.09	0.20	0.25
0.10	0.10	0.22	0.29
0.05	0.19	0.43	0.56
0.03	0.29	0.66	0.83
0.03	0.38	0.87	1.11
0.02	0.48	1.08	1.39
0.01	0.96	2.16	2.76
0.002	4.76	10.79	14.36
0.001	9.57	21.64	27.62
0.0002	47.95	106.92	138.50
0.0001	94.58	213.67	275.30
0.00002	474.86	1077.50	1381.50
0.00001	953.78	2153.56	2885.96