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Title: Permeability and effective thermal conductivity of bisized porous media
Authors: Dias, Ricardo P.
Fernandes, Carla S.
Mota, Manuel
Teixeira, José A.
Yelshin, Alexander
Keywords: Fixed bed
Binary particulate mixtures
Effective thermal conductivity
Issue Date: 2007
Publisher: Elsevier
Citation: Dias, Ricardo P.; Fernandes, Carla S.; Mota, Manuel; Teixeira, José A.; Yelshin, Alexander (2007) - Permeability and effective thermal conductivity of bisized porous media. In International Journal of Heat and Mass Transfer. ISSN 0017-9310. 50:7-8 1295-1301
Abstract: In the region of minimum porosity of particulate binary mixtures, heat exchange and permeability were found to be higher than the ones obtained with a mono-size packing built with the same small size particles used in the binary packing. This effect was noticed in the range of the particles size ratio 0.1–1.0. The obtained improvement on thermal performance is related to the increase of effective thermal conductivity (ETC) in the binary packing and to the increase in transversal thermal dispersion due to the porosity decrease and tortuosity increase. Permeability can increase by a factor of two, if the size ratio between small and large spheres of a loose packing stays in the range 0.3–0.5.
Peer review: yes
ISSN: 0017-9310
Appears in Collections:DEMAT - Artigos em Revistas Indexados ao ISI/Scopus

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