On the problem of thermoacoustics of conductive materials under laser irradiation

Морозов, Н. Ф.; Muratikov, K. L.; Semenov, B. N.; Indeitsev, D. A.; Vavilov, D. S.

doi:10.31857/s0869-56524854438-441

Доклады Академии наук

2019

DOI: 10.31857/s0869-56524854438-441

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On the problem of thermoacoustics of conductive materials under laser irradiation

Н. Ф. Морозов

K. L. Muratikov

B. N. Semenov

et al.

Abstract: Within the framework of the one-temperature model of thermoelasticity, the analysis of the effect of electon localization processes on the thermoelastic response of conductors under pulsed laser irradiation is performed. It is shown that the localization of electrons can lead to a significant tightening of the deformation processes in conductors compared with the processes that develop according to the usual thermoelastic mechanism.

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References 6 publications

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On the fundamental solution of the heat transfer problem in one-dimensional harmonic crystals

Loboda¹,

Podolskaya²,

Кривцов³

et al. 2019

Comp. Contin. Mech.

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Unsteady thermal processes in low-dimensional structures are considered. Understanding the heat transfer at the micro-level is necessary to obtain a link between micro-and macroscopic descriptions of solids. At the macroscopic level, heat propagation is described by the Fourier law. However, at the microscopic level, analytical, numerical and experimental studies show significant deviations from this law. The previously created model of heat transfer at the microlevel, which has a ballistic character, is used in the work. The influence of non-nearest neighbors on the thermal processes in discrete media is studied, as well as the heat distribution in polyatomic lattices is considered. To describe the evolution of the initial thermal perturbation, the analysis of dispersion characteristics and group velocities in a one-dimensional crystal for a diatomic chain with alternating masses or stiffnesses and a monoatomic chain with regard for interaction with second neighbors is carried out. The fundamental solution of the heat propagation problem for the corresponding crystal models is obtained and studied. The fundamental solution allows us to obtain a description of the waves running from a point source and to use it as a basis for the construction of all other solutions. For both chains, the solution consists of two fronts moving one after another with different velocities and intensity characteristics. Quantitative estimations of the thermal wavefront intensity coefficients are given, and the dynamics of changes in speeds and intensities of the waves depending on the parameters of the problem is analyzed. Two mechanisms of evolution of the heat wavefront in one-dimensional discrete systems are revealed. The presented results can be used for correct interpretation of experiments on unsteady ballistic heat transfer in crystals.

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On the fundamental solution of the heat transfer problem in one-dimensional harmonic crystals

Loboda¹,

Podolskaya²,

Кривцов³

et al. 2019

Comp. Contin. Mech.

View full text Add to dashboard Cite

show abstract

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On the problem of thermoacoustics of conductive materials under laser irradiation

Cited by 1 publication

References 6 publications

On the fundamental solution of the heat transfer problem in one-dimensional harmonic crystals

On the fundamental solution of the heat transfer problem in one-dimensional harmonic crystals

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