Aging kinetics of porous media due to freezing-thawing cycles
Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko chaussée, Sofia
Revised: 5 January 2000
Published online: 15 May 2000
The two-dimensional Ausloos et al. model of fluid invasion, freezing and thawing in a porous medium is elaborated upon and investigated in order to take into account the pore volume redistribution and conservation during freezing. The results are qualitatively different from previous work, since the damaged pore sizes are found to be much less than the possible maximum value and is reached after a large number of invasion-freezing-thawing cycles, e.g. the material is "slowly damaged". The pore size distribution is thus found in better agreement with expected practical findings. The successive invasion percolation clusters are still found to be self-avoiding with aging. The cluster size decreases with a power law as a function of invasion-frost-thaw iterations. The aging kinetics is also discussed through the normalized totally invaded pore volume.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 81.05.Rm – Porous materials; granular materials / 81.40.Np – Fatigue, corrosion fatigue, embrittlement, cracking, fracture and failure
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000