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Space-Time Region of Propagation of Heat Flux Through a Lubricated Contact with Account for the Heat-Shielding Effect of Oil Films

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Journal of Engineering Physics and Thermophysics Aims and scope

The investigations deal with the study of the heat-shielding effect of thin oil films during the passage of heat flux through them, the conditions for its occurrence, and the space-time region of propagation through heterogeneous media with account for the reduced thermophysical characteristics. The paper presents theoretical calculations and experimental investigations conducted on a special self-engineered device. Consideration has been given to the influence of the oil film thickness, the amplitude and time of the heat pulse on the velocity of its propagation simultaneously through a lubricated contact and an unlubricated one. The results of observations over the pattern of heat flux propagation has made it possible to draw a conclusion that the heat flux released, for example, as a result of friction on a microscopic contact is characterized by high density and propagates with a significant velocity predominantly in the direction with the least thermal resistance determined by the thermophysical characteristics and the temperature potential of the material. Considering that the processes occur at the microscopic level, such materials include thin boundary films (oil. oxide, spray-applied and other films) with a thickness comparable with the height of microroughnesses.

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Authors and Affiliations

  1. G. F. Morozov Voronezh State University of Forestry and Technologies, 8 Timiryazev Str., Bldg 1, Voronezh, 394087, Russia

    D. A. Popov, A. M. Kadyrmetov & A. S. Pustovalov

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  1. D. A. Popov
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  2. A. M. Kadyrmetov
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  3. A. S. Pustovalov
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Correspondence to D. A. Popov.

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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 94, No. 6, pp. 1489–1500, November–December, 2021.

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Popov, D.A., Kadyrmetov, A.M. & Pustovalov, A.S. Space-Time Region of Propagation of Heat Flux Through a Lubricated Contact with Account for the Heat-Shielding Effect of Oil Films. J Eng Phys Thermophy 94, 1456–1466 (2021). https://doi.org/10.1007/s10891-021-02425-3

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  • DOI: https://doi.org/10.1007/s10891-021-02425-3

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