Figure 10.

Graph showing spatial concentration (C) profiles in a capillary-tissue exchange unit at t = 200 seconds. At this time, the concentration in each location relative to the peak concentration in the downstream corner remains at a constant ratio. The parameters were F_p = PS_ecl = PS_eca = PS_pc = 1.0 (ml/g)/min; PS_g = 0; V_p = 0.05, ${\mathrm{V}}_{\text{ec}}^{\prime }=0.025$, ${\mathrm{V}}_{\text{isf}}^{\prime }=0.2$, and ${\mathrm{V}}_{\text{pc}}^{\prime }=0.5\text{ml}/\mathrm{g}$. (For definition of terms, refer to Figure 1.) Control axial diffusion (D_r) = 0 (solid lines); all D_r = 10⁻⁴ cm²/sec (dashed lines). At t = 200 seconds, the residue function is 0.044 for the control case and 0.045 for the test case. The fractional escape rates η(t) at t = 200 sec were 0.00771/sec for D_r = 0 and 0.00755/sec for D_r = 10⁻⁴ cm²/sec.