Investigation of transport property of fibrous media: 3D virtual modeling and permeability calculation

Huang, Xiang; Zhao, Yanwei; Wang, Hongwei; Qin, Hao; Wen, Desheng; Zhou, Wei

doi:10.1007/s00366-017-0511-4

Cited by 4 publications

(1 citation statement)

References 34 publications

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“…Andersen et al, have shown a clear directional dependence of pressure drop on flow orientation in FeCrAl short-fiber structures [3], and they also identified an analytical model with a good fit when the fluid flow is perpendicular to the isotropic plane [35]. Huang et al [36] calculated the pressure drop based on a length-weighted orientation model. However, the simulation results were not validated appropriately by experimental results.…”

Section: Pressure Drop Of Fiber Structuresmentioning

confidence: 99%

Strongly Orthotropic Open Cell Porous Metal Structures for Heat Transfer Applications

Fink

Andersen

Seidel

et al. 2018

Metals

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For modern thermal applications, open cell porous metals provide interesting opportunities to increase performance. Several types of cellular metals show an anisotropic morphology. Thus, using different orientations of the structure can boost or destroy the performance in thermal applications. Examples of such cellular anisotropic structures are lotus-type structures, expanded sheet metal, and metal fiber structures. Lotus-type structures are made by casting and show unidirectional pores, whereas expanded sheet metal structures and metal fiber structures are made from loose semi-finished products that are joined by sintering and form a fully open porous structure. Depending on the type of structure and the manufacturing process, the value of the direction-dependent heat conductivity may differ by a factor of 2 to 25. The influence of the measurement direction is less pronounced for the pressure drop; here, the difference varies between a factor of 1.5 to 2.8, depending on the type of material and the flow velocity. Literature data as well as own measurement methods and results of these properties are presented and the reasons for this strongly anisotropic behavior are discussed. Examples of advantageous applications, for example a latent heat storage device and a heat exchanger, where the preferential orientations are exploited in order to gain the full capacity of the structure’s performance, are introduced.

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Section: Pressure Drop Of Fiber Structuresmentioning

confidence: 99%