The permeability of virtual macroporous structures generated by sphere packing models: Comparison with analytical models

Abstract

The permeability of virtual macroporous structures generated by sphere packing models: comparison with analytical models. Scripta Materialia, 124 . pp. 30-33. ISSN 1359-6462 Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/34471/1/DEM%20CFD%20-%20scripta%20mat.pdf Copyright and reuse:The The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. AbstractRealistic porous structures typical of those made by replication of packed beds of spherical particles have been produced by a novel modelling method. Fluid dynamics simulation of the permeability of these structures agrees well with experimental measurements and similar modelling of structures derived from X-ray tomographic images. By varying the model structures the "bottleneck" flow concept proposed by analytical models in the literature was substantiated, confirming the high dependence of permeability on the size of the windows connecting the pores but also highlighting the need for accurate determination of the connectivity of the pores for these models to be accurate.

The permeability of replicated microcellular structures in the Darcy regime

“…They are classified into open‐celled and close‐celled cellular structures and can be made by different technological processes like additive manufacturing, pressure‐less sintering, replication‐casting route, reactive processing, and gas entrapment techniques . The resulting effects are a microstructural change aptly influenced by technological routes and operating conditions . The unique and combined characteristics of lightweight, high surface area and high thermal conductivity of these materials enable their suitability as structures that interact with fluid and heat transfer processes.…”

“…Figure presents a typical porous metallic structure made by replication casting routes of pouring liquid melts in the convergent gaps created by packed beds of monosized porogens. A detailed processing route adopting this technique is described in References .…”

“…An optical micrograph left of a porous sample made by vacuum casting using near‐spherical NaCl and right, an X‐Ray CT (μCT) image showing the typical pore connectivity (Adapted from References [Color figure can be viewed at wileyonlinelibrary.com]…”

Mass Transfer Performance of Porous Nickel Manufactured by Lost Carbonate Sintering Process

“…[1][2][3][4][5][6][7][8][9] Open-cell porous metals have been regarded as excellent electrode materials in energy generation and storage. [1][2][3][4][5][6][7][8][9] Open-cell porous metals have been regarded as excellent electrode materials in energy generation and storage.…”

“…Typical current versus potential plot for the reduction of Fe(CN)6 À3 in 10 À4 M K 3 Fe(CN) 6 þ 10 À3 M K 4 Fe(CN) 6 þ 1 M Na 2 CO 3 at a porous nickel electrode with a scan rate of 0.005 V s À1 .…”