Model finite length pore

Kenjo et al. [1991] have described composite electrodes using the finite length pore model shown in Figure 4.1.15. The electronic and ionic conductor paths run in parallel, with pores providing access to the gas phase via the electrolyte, which is unrealistic, but may not be of any great consequence. Essentially, the composite... 

Figure 5.12 Finite element analysis of shear stress distribution around a circular pore under biaxial stress, (a) The finite element analysis model, showing a single circular pore in a solid brick, (b) Plot of shear stress along a diagonal line in the model as a function of distance from pore wall. The units are arbitrary and the length scale of the stress field is determined by the pore diameter in the model (10 distance units)...

The adsorption process is, in this case, described with the help of a potential in between a perfect cylindrical pore of infinite length but finite radius, rp [18]. The calculation is made with the help of a model similar to those developed by Horvath-Kawazoe for determining the MPSD [18], which includes only the van der Waals interactions, calculated with the help of the L-J potential. In order to calculate the contribution of the dispersion and repulsion energies, Everett and Powl [45] applied the L-J potential to the case of the interaction of one adsorbate molecule with an infinite cylindrical pore consisting of adsorbent molecules (see Figure 6.20), and obtained the following expression for the interaction of a molecule at a distance r to the pore wall [18]... 

The ability to model can be seen in Fig. 6.6.1 where comparisons are given between finite element calculations and experimental results for the electro-osmotic purging of a 100 mol m acetic acid solution initially saturating a kaolin clay sample. The distributions shown are after 0.12 of a pore volume of liquid is removed. The purge is a 100 mol m NaCl solution and the sample is compacted in an acrylic cylinder 0.5 m in length and 0.1 m in diameter with... 

If the model is extended to pores with finite and uniform length, the penetration depth will eventually reach the length of the pores when the frequency is sufficiently low. A further decrease in frequency would result in pure capacitive... 

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