Flow and dispersion in anisotropic porous media: A lattice-Boltzmann study
Journal article, 2016

Given their capability of spreading active chemical species and collecting electricity, porous media made of carbon fibers are extensively used as diffusion layers in energy storage systems, such as redox flow batteries. In spite of this, the dispersion dynamics of species inside porous media is still not well understood and often lends itself to different interpretations. Actually, the microscopic design of efficient porous media, which can potentially and effectively improve the performances of flow batteries, is still an open challenge. The present study aims to investigate the effect of fibrous media micro-structure on dispersion, in particular the effect of fiber orientation on drag and dispersion dynamics. Several lattice-Boltzmann simulations of flows through differently oriented fibrous media coupled with Lagrangian simulations of particle tracers have been performed. Results show that orienting fibers preferentially along the streamwise direction minimizes the drag and maximizes the dispersion, which is the most desirable condition for diffusion layers in flow batteries’ applications.

Author

Dario Maggiolo

University of Padua

Francesco Picano

University of Padua

Massimo Guarnieri

University of Padua

Physics of Fluids

0031-9171 (ISSN)

Vol. 28 10 102001

Driving Forces

Sustainable development

Innovation and entrepreneurship

Subject Categories

Other Engineering and Technologies not elsewhere specified

Other Physics Topics

Fluid Mechanics and Acoustics

Areas of Advance

Energy

Materials Science

Roots

Basic sciences

DOI

10.1063/1.4963766

More information

Latest update

4/8/2021 1