Abstract
PurposeTo give a new method to calculate the thermal conductivity of thin films which thickness is less than micro‐nanometer when non‐Fourier effect will appear in heat conduction and Fourier law is not applicable for calculating the thermal conductivity.Design/methodology/approachThe Cattaneo equation based on the heat flow relaxation time approximation is used to calculate the thermal conductivity.FindingsThe results show that the thermal conductivity is not the thermophysical properties of material, but is the non‐linear function of temperature and film thickness when the dimension of film is less than micro‐nanometer.Research limitations/implicationsThe application of this method is limited by little experimental data of heat flow relaxation time for materials other than Ar crystals.Originality/valueThe paper demonstrates how the thermal conductivity of Ar crystals film can be calculated by NEMD algorithm and considers the non‐Fourier effect in the simulation.
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