Table 1.

Characteristics and computed dispersion in 5 acinar models

Model	g1	g2	g3	g4	g4-asym
Number of alveoli	17	43	97	208	93
Entrance lumen diameter (mm)	0.206	0.266	0.266	0.266	0.236
Reynolds number at entrance	0.006	0.012	0.027	0.057	0.029
Volume at FRC (mm3)	0.089	0.234	0.537	1.147	0.518
Dispersion in normal gravity (mm3)	0.0042	0.0279	0.0837	0.1576	0.0853
Dispersion in 0 gravity (mm3)	0.0029	0.0047	0.0196	0.0964	0.0042

gn, symmetric model with n generation (n = 1, 2, 3, 4); g4-asym, asymmetric 4-generation model; FRC, functional residual capacity.