Effective heat conduction in hybrid sphere & wire nanodispersions

摘要

Heat conductivity of dispersions can be modified by varying shapes of dispersed particles and also by making hybrid dispersions containing particles of different shapes and sizes. Spheres and their agglomerates that we have investigated previously are replaced in this paper by spheres and wires. The method used to derive the formulas for the overall effective heat conductivity is based on the Maxwell homogenization (adapted to hybrid dispersions) followed by a mesoscopic analysis in which heat transfer is regarded as transport of phonons. The mesoscopic formulation provides then also a setting for investigation the role of particle-matrix nanoscale interfaces.