1977 年 26 巻 288 号 p. 827-832
In this investigation, the pore structure and the tortuosity factors with respect to gas flow and diffusion were studied for glass bead sintered pellets (GB) and several practical porous materials.
The above three characterizing properties were measured by a marcury penetration method, a permeation method and a Wicke-Kallenbach type diffusion apparatus.
The obtained results are as follows:
(1) On the basis of Parallel Pore Model, the effective diffusion coefficient De for a practical porous material can be estimated well from both the pore diameter and the tortuosity factor τD of 2.35 obtained for GB.
(2) The difference between τF and τD seems to be attributable to the difference in each effective pore space for flow and diffusion.