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JOURNALS // Dal'nevostochnyi Matematicheskii Zhurnal // Archive

Dal'nevost. Mat. Zh., 2022 Volume 22, Number 1, Pages 28–37 (Mi dvmg465)

Heat flow calculation for a harmonic model of a one-dimensional crystal

M. A. Guzev, A. A. Dmitriev

Institute for Applied Mathematics, Far Eastern Branch, Russian Academy of Sciences, Vladivostok

Abstract: A one-dimensional non-dissipative harmonic chain of particles is considered, located between two thermal reservoirs. Using the fundamental solution of the one-dimensional harmonic model, an analytical representation is obtained for the discrete expression of the heat flux. Time averaging was performed, which allows taking into account the stationary characteristics of the heat transfer process. It is shown that the averaged heat flux includes two physically different components. The first one is proportional to the temperature difference between the reservoirs and characterizes the heat transfer along the chain. The second one determines the initial value of the flow when the temperatures of the tanks are equal.

Key words: harmonic chain, fundamental solution, time averaging, heat flux.

UDC: 517.927.2, 531

MSC: Primary 34A25; Secondary 34A30, 70B99

Received: 16.05.2022

DOI: 10.47910/FEMJ202202



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