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On the thermal conductivity of sintered metallic fibre structures

By C. Veyhl, T. Fiedler, O. Andersen, J. Meinert, T. Bernthaler, I.V. Belova and G.E. Murch


The present paper investigates the anisotropic thermal conductivity of a novel sintered metallic fibre structure with different porosities (i.e. 51.9%, 74.9%, 81.4%). Different methodologies are applied: numerical calculations (i.e. Finite Element and Lattice Monte Carlo methods) based on micro-computed tomography images, experimental tests (i.e. steady-state plate method) and analytical modelling. Good agreement between the numerical methods and experimental measurements is obtained for high porosity models (i.e. porosity > 72.5%). Furthermore, the thermal conductivity decreases with increasing porosity. A distinct thermal anisotropy is found where maximum values are in the parallel direction and minimum values in the transverse direction to the fibres

Year: 2012
DOI identifier: 10.1016/j.ijheatmasstransfer.2012.01.016
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Provided by: Fraunhofer-ePrints
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