Abstract
Permeability through porous media was evaluated theoretically by using a network model. In this model, a porous material is assumed to be a network which is composed of a large number of pore segments of a constant length. The pore diameter distribution is also assumed to be the normal, the RosinRammler or the logarithmic normal distribution. The flow rate through a network was calculated with the Kirchhoff' low under a certain pressure difference between the both sides of the network. Then the permeability was calculated from the rate.
The following results were obtained.
1) Permeability varies with the broadness of the pore diameter distribution.
2) Permeability decreases with the number of pore segments increasing.
3) There is little difference among the results calculated from the network model in which the pore diameter distribution is assumed to be the normal, the Rosin-Rammler or the logarithmic normal distribution.
4) Purcell's factor can be evaluated from the network model. The factor varies with the broadness of the pore diameter distribution.
