Diffusion in a fractal system (Journal article)

Makri, P.K.Romanos, G.Steriotis, T.Kanellopoulos, N.K.Mitropoulos, A.Ch.


 Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/7319
The surface geometry of Vycor porous glass was examined by using the relative permeability (P(R)) technique in a H2O/He system. At a water relative pressure of ~0.3, a maximum is observed on the P(R) curve. This maximum is explained in terms of geometrical changes taking place due to the deposition of a water film on the internal Vycor surface. When the sample is dry, diffusion in a fractal system is found to be more appropriate in describing the process. When the sample is wet, the diffusion process obeys classical Knudsen theory for smooth cylinders.
Institution and School/Department of submitter: Δεν υπάρχει πληροφορία
Subject classification: Glass
Keywords: Fractals;Relative permeability;Vycor porous glass
URI: http://hdl.handle.net/123456789/7319
Publisher: Δεν υπάρχει πληροφορία
Item type: journalArticle
General Description / Additional Comments: Volume 206 , Issue 2, pp. 605-606
http://www.scopus.com/inward/record.url?eid=2-s2.0-0032532602&partnerID=40&md5=368822163f5fe69ca489eea6667cc141
Institute of Physical Chemistry, Natl. Ctr. for Sci. Res. Demokritos, 153 10 Ag. Paraskevi Attikis, POB 60228, Athens, Greece
Subject classification: Glass
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Item language: en
Item access scheme: free
Institution and School/Department of submitter: Δεν υπάρχει πληροφορία
Publication date: 1998
Bibliographic citation: Δεν υπάρχει πληροφορία
Abstract: The surface geometry of Vycor porous glass was examined by using the relative permeability (P(R)) technique in a H2O/He system. At a water relative pressure of ~0.3, a maximum is observed on the P(R) curve. This maximum is explained in terms of geometrical changes taking place due to the deposition of a water film on the internal Vycor surface. When the sample is dry, diffusion in a fractal system is found to be more appropriate in describing the process. When the sample is wet, the diffusion process obeys classical Knudsen theory for smooth cylinders.
Publisher: Δεν υπάρχει πληροφορία
Journal name: Journal of Colloid and Interface Science
Journal type: peer-reviewed
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