Diffusion in reconstructed porous domains filled by two fluid phases

Galani, AN; Kainourgiakis, ME; Kikkinides, ES; Steriotis, T; Stubos, AK; Papaioannou, A

dc.contributor.author	Galani, AN	en
dc.contributor.author	Kainourgiakis, ME	en
dc.contributor.author	Kikkinides, ES	en
dc.contributor.author	Steriotis, T	en
dc.contributor.author	Stubos, AK	en
dc.contributor.author	Papaioannou, A	en
dc.date.accessioned	2014-03-01T02:42:35Z
dc.date.available	2014-03-01T02:42:35Z
dc.date.issued	2004	en
dc.identifier.issn	0927-7757	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31052
dc.subject	Diffusion	en
dc.subject	Porous media	en
dc.subject	Relative diffusivity	en
dc.subject	Simulated annealing	en
dc.subject	Stochastic reconstruction	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	Deposition	en
dc.subject.other	Diffusion	en
dc.subject.other	Image analysis	en
dc.subject.other	Interfacial energy	en
dc.subject.other	Volume fraction	en
dc.subject.other	Wetting	en
dc.subject.other	Non-wetting phases	en
dc.subject.other	Three-dimensional binary images	en
dc.subject.other	Porous materials	en
dc.subject.other	tracer	en
dc.subject.other	algorithm	en
dc.subject.other	conference paper	en
dc.subject.other	diffusion	en
dc.subject.other	energy	en
dc.subject.other	error	en
dc.subject.other	liquid	en
dc.subject.other	porosity	en
dc.subject.other	priority journal	en
dc.subject.other	simulation	en
dc.subject.other	stochastic model	en
dc.subject.other	wettability	en
dc.title	Diffusion in reconstructed porous domains filled by two fluid phases	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/j.colsurfa.2004.04.021	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.colsurfa.2004.04.021	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	In the present study, the tracer diffusion in porous media filled by a wetting and a non-wetting phase is investigated. The disordered porous structure of porous systems like random sphere packing, and the North Sea chalk, is represented by three-dimensional binary images. The random sphere pack is generated by a standard ballistic deposition procedure, while the chalk matrix by a stochastic reconstruction technique. Physically sound spatial distributions of the two phases filling the pore space are determined by the use of a simulated annealing algorithm, where the wetting and the non-wetting phases are initially randomly distributed in the pore space and trial-and-error swaps are performed in order to attain the global minimum of the total interfacial energy. The effective diffusivities of the resulting domains are computed by a random walk method. A parametric study with respect to the pore volume fraction occupied by each phase and the ratio of the diffusivities in the wetting and non-wetting phases, is performed. Furthermore, the dependence of the effective diffusivity on the porosity for chalk-like structures is examined. (C) 2004 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Colloids and Surfaces A: Physicochemical and Engineering Aspects	en
dc.identifier.doi	10.1016/j.colsurfa.2004.04.021	en
dc.identifier.isi	ISI:000223714100037	en
dc.identifier.volume	241	en
dc.identifier.issue	1-3	en
dc.identifier.spage	273	en
dc.identifier.epage	279	en