A D-N Alternating Algorithm for Solving 3D Exterior Helmholtz Problems

Table 4

The relation between convergence rate and mesh.

Mesh		Iterative times
		0	1	2	3	4	12
I	𝑒	0.16651	0.12025	0.11342	0.11354	0.11339	0.11327
	𝑒ℎ		0.11547	0.10300	0.08651	0.07381	0.06525
	𝑞ℎ			1.12105	1.19058	1.17205	1.13114
II	𝑒	0.13381	0.03434	0.05268	0.04849	0.04945	0.04927
	𝑒ℎ		0.02834	0.01814	0.01162	0.00745	0.00478
	𝑞ℎ			1.56223	1.56134	1.56001	1.56018
III	𝑒	0.08874	0.01239	0.01753	0.01623	0.01648	0.01644
	𝑒ℎ		0.01056	0.00449	0.00191	0.00083	0.00036
	𝑞ℎ			2.35073	2.35327	2.30124	2.29801