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Advisor(s)
Abstract(s)
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.
Description
Keywords
Fixed bed Binary particulate mixtures Permeability Effective thermal conductivity
Citation
Dias, Ricardo P.; Fernandes, Carla S.; Mota, Manuel; Teixeira, José A.; Yelshin, Alexander (2007). Permeability and effective thermal conductivity of bisized porous media. International Journal of Heat and Mass Transfer. ISSN 0017-9310. 50:7-8 1295-1301
Publisher
Elsevier