Characterization of fluid-mechanic efficiency of porous electrodes using X-ray computed tomography and Lattice-Boltzmann simulations
Other conference contribution, 2017
To clarify this issue, real carbon felt electrodes have been reconstructed by means of X-ray computed tomography (CT). In particular, a metrological micro-CT system has been used to obtain accurate three-dimensional reconstructions, which have then been used as input for Lattice-Boltzmann flow simulations coupled with a Lagrangian Particle Tracking algorithm, in order to investigate the dispersion and reaction behaviour of tracers through the medium microstructures, see e.g. Fig.1. For each material, macroscopic dispersion, reaction efficiencies and flow resistance have been evaluated from the underlying microscopic statistics of flow and tracer trajectories.
From these analyses, the overall fluid-mechanic efficiency of each material has been evaluated and compared allowing the identification of the optimal porous microstructure for flow battery applications, which shows the highest dispersion and reaction rate together with the lowest pressure drop.
[1] Wang B., Kuo J., Bae S.C. and Granick S., 2012. Nature Materials, 11(6): 481-5.
[2] Alotto P., Guarnieri M. and Moro F., 2014. Renewable and Sustainable Energy Reviews, 29,
pp.325-335.
[3] Maggiolo D., Picano F. and Guarnieri M., 2016. Physics of Fluids, 28(10), p.102001.
Author
Dario Maggiolo
Chalmers, Applied Mechanics, Fluid Dynamics
Andrea Trovò
University of Padua
Francesco Picano
University of Padua
Filippo Zanini
University of Padua
Simone Carmignato
University of Padua
Massimo Guarnieri
University of Padua
Hannover, Germany,
Subject Categories
Energy Engineering
Other Chemical Engineering
Fluid Mechanics and Acoustics