An Iterative Method for Problems with Multiscale Conductivity

Table 2

The 𝐿² errors for the models (b) and (c). ‖𝑢−𝑈_ℎ‖_Ω: errors in the solution (voltage), ‖𝐽−𝐽_ℎ‖_Ω: errors in current density (computed from voltage), and Iter.: number of iterations.

𝑁	Model (b)			Model (c)
	‖𝑢−𝑈ℎ‖Ω	‖𝐽−𝐽ℎ‖Ω	Iter.	‖𝑢−𝑈ℎ‖Ω	‖𝐽−𝐽ℎ‖Ω	Iter.
32	0.0121	0.1828	7	0.0096	0.3220	7
64	0.0120	0.1800	13	0.0091	0.3070	14
128	0.0067	0.1413	47	0.0053	0.2449	50
256	0.0022	0.0462	397	0.0035	0.0640	739