Effective Thermal Conductivity of Composites: Numerical Study

Document Type : Original Article

Author

Associate Professor, Department of Physics, Faculty of Science, University of M’sila, Algeria

10.22115/cepm.2023.423376.1251

Abstract

The objective of this paper was to estimate the effective thermal conductivity (Keff) values of the composite based on fibers, and to validate the experimental values measured in previous work. The paper focuses especially on the numerical investigation of the effective thermal conductivity (Keff) of date palm fibers/ mortar composite. The finite element model was employed for modeling the thermal heat transport. The effect of the inclusions concentrations, the diameter of fibers, and the thermal contact resistance on the composites is considered. The numerical results are compared with measured experimental data and some theoretical models. As conclusions, it was shown that adding date palm fibers to mortar leads to a diminution of the effective thermal conductivity. Also, the effect of each of the factors studied on the effective thermal conductivity is almost nonexistent. On the other hand, both theoretical and simulation models give close results with experimental values for the high concentrations of fibers.

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