Table 1.

Results of a convergence study for a human atrium mesh with isotropic conductivity for a range of values of polynomial order P, element characteristic length h and time-step Δt. Timings show absolute wall time for a 600 ms simulation on 80 cores of an SGI Altix ICE 8200 EX.

h (mm)	P	$N_{\mathit{elmt}}$	DOF	Δt (ms)	$A_{\max }$ (ms)	T
0.6	1	297 898	149 493	0.02	172	56 m 56 s
0.8	1	93 309	46 960	0.02	194	17 m 10 s
1.0	1	38 144	19 268	0.02	241	6 m 58 s
1.2	1	18 222	9246	0.02	321	3 m 21 s
1.4	1	9869	5033	0.02	442	1 m 53 s
0.8	2	93 309	187 232	0.02	175	29 m 55 s
1.0	2	38 144	76 684	0.02	186	12 m 16 s
1.2	2	18 222	36 717	0.02	211	5 m 55 s
1.4	2	9869	19 938	0.02	250	3 m 12 s
0.8	3	93 309	420 811	0.02	176	45 m 58 s
1.0	3	38 144	172 245	0.02	178	18 m 25 s
1.2	3	18 222	82 410	0.02	187	8 m 48 s
1.4	3	9869	44 712	0.02	207	4 m 55 s
1.4	4	9869	79 355	0.02	188	7 m 07 s
1.4	5	9869	123 867	0.10	193	1 m 57 s
1.4	5	9869	123 867	0.08	190	2 m 26 s
1.4	5	9869	123 867	0.06	187	3 m 14 s
1.4	5	9869	123 867	0.04	185	4 m 48 s
1.4	5	9869	123 867	0.02	182	9 m 38 s
1.4	5	9869	123 867	0.01	180	18 m 58 s
1.4	5	9869	123 867	0.005	177	39 m 21 s
1.4	6	9869	178 248	0.02	178	12 m 33 s