Work

On the origin and application of the Bruggeman correlation for analysing transport phenomena in electrochemical systems

Year: 2016

Type: review

Abstract: The widely used Bruggeman equations correlate tortuosity factors of porous media with their porosity. Finding diverse application from optics to bubble formation, it received considerable attention in fuel cell and battery research, recently. The ability to estimate tortuous mass transport resistance based on porosity alone is attractive, because direct access to the tortuosity factors is notoriously difficult. The correlation, however, has limitations, which are not widely appreciated owing to the limited accessibility of the original manuscript. We retrace Bruggeman's derivation, together with its initial assumptions, and comment on validity and limitations apparent from the original work to offer some guidance on its use.

Source: Current Opinion in Chemical Engineering

DOI: 10.1016/j.coche.2016.02.006

Authors: Bernhard Tjaden, Samuel J Cooper, Daniel JL Brett, Denis Kramer, Paul R Shearing

Institutions: University College London, Imperial College London, University of Southampton

Language: English

Topic: Heat and Mass Transfer in Porous Media

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,250

Funders: Royal Academy of Engineering, Engineering and Physical Sciences Research Council