TABLE 1.

| Boundary conditions for the porous tissue construct of the length L, channel radius r_c, and half distance between centers of two channels r_t

	Channel	Tissue annulus
z = 0	0 ≤ r < rc Ca = Cin	0 ≤ r < rt Ct = Cin (or $\frac{\partial C_{\mathrm{a}}(r,L)}{\partial z}=0$)
z = L	0 ≤ r < rc Ca = Cout	0 ≤ r < rt Ct = Cout (or) $C_{\mathrm{t}}(r,L)=\frac{{\int }_0^{r_{\mathrm{c}}}{C}_{\mathrm{a}}(r,L)wrdr}{{\int }_0^{r_{\mathrm{c}}}wrdr})$
0 ≤ z ≤ L	r = 0 ∂CL/∂r = 0	r = rt ∂Ct/∂r = 0
0 ≤ z ≤ L r = rc	$D_{\mathrm{a}}\frac{\partial C_{\mathrm{a}}}{\partial r}=D_{\mathrm{t}}\frac{\partial C_{\mathrm{t}}}{\partial r}$	Ca = Ct