Investigation of transport phenomena in porous structures containing three fluid phases

Galani, AN; Kainourgiakis, ME; Papadimitriou, NI; Papaioannou, ATh; Stubos, AK

dc.contributor.author	Galani, AN	en
dc.contributor.author	Kainourgiakis, ME	en
dc.contributor.author	Papadimitriou, NI	en
dc.contributor.author	Papaioannou, ATh	en
dc.contributor.author	Stubos, AK	en
dc.date.accessioned	2014-03-01T01:26:31Z
dc.date.available	2014-03-01T01:26:31Z
dc.date.issued	2007	en
dc.identifier.issn	0927-7757	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18113
dc.subject	Interfacial energy minimization	en
dc.subject	Phase distribution	en
dc.subject	Porous media	en
dc.subject	Simulated annealing	en
dc.subject	Transport properties	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	Computation theory	en
dc.subject.other	Finite difference method	en
dc.subject.other	Image reconstruction	en
dc.subject.other	Interfacial energy	en
dc.subject.other	Simulated annealing	en
dc.subject.other	Sorption	en
dc.subject.other	Creeping flow	en
dc.subject.other	Interfacial energy minimization	en
dc.subject.other	Multiphase systems	en
dc.subject.other	Phase distribution	en
dc.subject.other	Porous materials	en
dc.subject.other	article	en
dc.subject.other	flow kinetics	en
dc.subject.other	interface pressure	en
dc.subject.other	liquid	en
dc.subject.other	mathematical analysis	en
dc.subject.other	porosity	en
dc.subject.other	priority journal	en
dc.subject.other	surface property	en
dc.subject.other	transport kinetics	en
dc.title	Investigation of transport phenomena in porous structures containing three fluid phases	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.colsurfa.2007.01.044	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.colsurfa.2007.01.044	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	The spatial distribution of three fluid phases inside pore structures is determined through the minimization of total interfacial energy. A modified simulated annealing scheme is used for the determination of the optimal configuration rendering the method efficient at low saturations. The study in a further step of the distributions of the fluid phases in single and multipore domains indicates that the combination of the digital reconstruction with the annealing-based technique can adequately represent those multiphase systems. The proposed method provides the basis for the future prediction of sorption and transport properties of porous materials filled with more than two fluid phases. In order to testify the method, the tracer diffusion in a random sphere packing filled by three fluid phases as well as the creeping flow of a fluid phase through the same porous structure when the pore space is occupied by two immobile fluid phases, are investigated. The effective diffusivities are computed by a random walk method. The relative permeabilities are determined through the solution of Stokes equations using a finite-difference scheme in conjunction with the artificial compressibility relaxation algorithm. It is found that the aforementioned transport properties of the wetting and the non-wetting phases are in a good agreement with pertinent literature data and also are independent of whether the pore space is occupied by two or three fluid phases. The former reinforces the reliability of the proposed fluid-phase distribution technique. For both effective diffusivities and relative permeabilities, a number of very useful empirical equations, when only one fluid phase is conducting, are generated. (C) 2007 Published by Elsevier B.V.	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.2007.01.044	en
dc.identifier.isi	ISI:000246548700026	en
dc.identifier.volume	300	en
dc.identifier.issue	1-2 SPEC. ISS.	en
dc.identifier.spage	169	en
dc.identifier.epage	179	en