Reference : On Water Transfer and Hydraulic Connection Layer During the Convective Drying of Rigi...
Scientific journals : Article
Engineering, computing & technology : Chemical engineering
http://hdl.handle.net/2268/183344
On Water Transfer and Hydraulic Connection Layer During the Convective Drying of Rigid Porous Material
English
Prime, Noémie [Université de Liège - ULiège > Département ArGEnCo > Géomécanique et géologique de l'ingénieur > >]
Housni, Z [> >]
Fraikin, Laurent mailto [Université de Liège > Département de chimie appliquée > Génie chimique - Procédés et développement durable >]
Léonard, Angélique mailto [Université de Liège > Département de chimie appliquée > Génie chimique - Procédés et développement durable >]
Charlier, Robert mailto [Université de Liège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur >]
Levasseur, Séverine mailto [> >]
2015
Transport in Porous Media
Kluwer Academic Publishers
106
1
47-72
Yes (verified by ORBi)
International
0169-3913
1573-1634
[en] Convective drying ; Hydraulic connection layer ; Hydro-thermal coupling ; Rock ; Water transfer ; Hydraulic connection
[en] The convective drying of a natural porous material, limestone, is investigated in this study, with both experimental and numerical approaches. The first experimental campaign, which focuses on the influence of samples’ slenderness, suggests the presence of a hydraulic connection layer between the porous water and the external environment, in spite of the very fine pore structure of the material. This hydraulic transfer enables the fast water evaporation at the beginning of the drying test, when external conditions drive the kinetics. Furthermore, the results show that this layer does not exceed 30 mm deep from the external surface, given the drying conditions of the test. A second experimental campaign aims to analyse, by mean of an X-ray tomography tool, the internal water content during the drying. It confirms that water transfer takes place within the limestone in two distinct stages. The first stage being faster than the second one with a homogeneous desaturation along the sample, it is consistent with the hypothesis of the hydraulic connection layer. Finally, the finite element modelling makes possible to identify the main mechanisms of water transfer, namely liquid convection and vapour diffusion. © 2014, Springer Science+Business Media Dordrecht
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
http://hdl.handle.net/2268/183344
10.1007/s11242-014-0390-8

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
TPM_2015.pdfPublisher postprint2.14 MBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.