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(Color online) Schematic of the nanowire composites simulated in this study. The nanowire composite is formed by stacking the representative volume element (RVE) periodically. The RVE contains a large number of randomly distributed nanowires. The actual simulation domain shifts half of a nanowire size from the original RVE to implement the periodic boundary conditions in phonon transport. The interfaces between the same type of wires are removed to form cluster.
(Color online) Size dependence of the nondimensioinalized effective thermal conductivity of the nanocomposites. The thermal conductivity of the bulk composites are taken from Ref. 7.
(Color online) Variation of effective thermal conductivity of the composites with thermal conductivity contrast ratio of the composed wires . The data for bulk composites are taken from Ref. 7. The effective thermal conductivity is not sensitive to the contrast ratio, especially when the volumetric concentration of the high thermal conductivity constituent is below percolation threshold.
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