Numerical Investigation of Thermal Conductivity of Particle Dispersive Composites Based on Fractal Method

Xiao Chuan Li; Xiang Yong Huang

doi:10.4028/www.scientific.net/AMR.616-618.1808

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Numerical Investigation of Thermal Conductivity of Particle Dispersive Composites Based on Fractal Method
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Structure and Property of Ce Conversion Coating on Magnesium Alloys
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Numerical Investigation of Thermal Conductivity of Particle Dispersive Composites Based on Fractal Method

Abstract:

Heat conduction performance of particle dispersive composites has been numerically investigated by using Finite volume method (FVM) and fractal theory. The effects of the thermal conductivity of particle and polymer matrix, the volume fraction of conductive particle, the dispersion and reunion form of particles on the effective thermal conductivity of composites are analyzed in detail. Results from the research indicate that thermal conductivities of composites will increase nonlinearly along with the increase of filling fraction of particles. Keeping the filling fraction constant, the dispersion and reunion form and direction of particles has significant effect on heat conduction performance of composite. Simple use of high thermal conductivity particles has limited effect on thermal performance of composites. Enhancing the contacts of particle in the direction of heat exchange and forming high heat transfer channels are the main and economical ways to improve heat conduction performance of particulate filled polymer matrix composites.