Mass transport modelling in porous media using delay differential equations

• Type: Article in International Scientific Journal
• Date: 2006

Authors

António Areosa Martins (Author) FEUP; Paulo Laranjeira (Author) Other; Madalena Dias (Author) FEUP; José Carlos Lopes (Author) FEUP

Journal

Title: Defect and Diffusion Forum

Vol. 258

Pages: 586-591

ISSN: 1012-0386

Publisher: Trans Tech Publications Ltd

Indexing

ISI Web of Science

Scopus

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

CORDIS: Technological sciences > Engineering > Chemical engineering

Other information

Authenticus ID: P-00R-Y0W

Abstract (EN): In this work the application of delay differential equations to the modelling of mass transport in porous media, where the convective transport of mass, is presented and discussed. The differences and advantages when compared with the Dispersion Model are highlighted. Using simplified models of the local structure of a porous media, in particular a network model made up by combining two different types of network elements, channels and chambers, the mass transport under transient conditions is described and related to the local geometrical characteristics. The delay differential equations system that describe the flow, arise from the combination of the mass balance equations for both the network elements, and after taking into account their flow characteristics. The solution is obtained using a time marching method, and the results show that the model is capable of describing the qualitative behaviour observed experimentally, allowing the analysis of the influence of the local geometrical and flow field characteristics on the mass transport.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6