
 OUTPUT Ex4.2.a
=================================================
 The effective diffusivity of O2 in air = 2.36e-02 cm2/s

 OUTPUT Ex4.2.b
=================================================
 The calculated surface mean pore radius = 6e-07 cm
 The predicted pore diffusivity = 2.18e-02 cm2/sec
 The corresponding tortusity = 0.50