The wind effect on the humidity of polymer composite materials in natural conditions

Laptev A.B., Matishov G.G., Sadkov V.R., Nikolaev E.V., Kogan A.M.
UDC
620.1:678.8
DOI
10.18577/2307-6046-2025-0-5-112-120
Article PDF (Russian) (709.3 KB)
How to cite
Laptev A.B., Matishov G.G., Sadkov V.R., Nikolaev E.V., Kogan A.M. The wind effect on the humidity of polymer composite materials in natural conditions // Proceedings of VIAM. 2025. No. 5. DOI: 10.18577/2307-6046-2025-0-5-112-120. URL: https://test.viam.ru/en/journal/2025/5/9
Keywords
wind, humidity, moisture saturation of polymers, climatic factors, free moisture, sorbed moisture, polymer aging
Abstract

The article considers the calculated dependencies of changes in the humidity and temperature in the volume and on the surface of a material sample under the influence of the wind. The study considers a case of the absence of free moisture on the surface. It is shown that the wind effect on the humidity of the surface is about affecting the surface temperature due to the viscous friction forces near the surface of the material sample. At the same time, free moisture in capillaries evaporates at a constant rate. Sorbed moisture, depending on the gradient of moisture concentration, temperature, and partial pressure of moisture in the bulk of the material, is removed at a decreasing rate.

Reference list
  1. Kablov E.N., Laptev A.B., Prokopenko A.N., Gulyaev A.I. Relaxation of polymeric composite materials under the prolonged action of static load and climate (review). Part 1. Binders. Aviation materials and technologies, 2021, no. 4 (65), paper no. 08. Available at: http://www.journal.viam.ru (accessed: May 10, 2024). DOI: 10.18577/2713-0193-2021-0-4-70-80.
  2. Kablov E.N. New generation materials and digital technologies for their processing. Vestnik Rossiyskoy akademii nauk, 2020, vol. 90, no. 4, pp. 331–334.
  3. Kablov E.N., Kondrashov S.V., Melnikov A.A., Schur P.A. Application of functional and adaptive materials obtained by 3D printing (review). Trudy VIAM, 2022, no. 2 (108), paper no. 03. Available at: http://www.viam-works.ru (accessed: May 10, 2024). DOI: 10.18577/2307-6046-2022-0-2-32-51.
  4. Veshkin E.A., Startsev V.O., Postnov V.I., Barannikov A.A. The climate impacts as the assessment of maintainability of products from carbon fiber. Trudy VIAM, 2019, no. 8 (80), paper no. 11. Available at: http://www.viam-works.ru (accessed: June 20, 2024). DOI: 10.18577/2307-6046-2019-0-8-98-108.
  5. Laptev A.B., Pavlov M.R., Zeleneva T.O. Light sources for simulating the aging of polymer materials under the influence of solar radiation. Trudy VIAM, 2024, no. 5 (135), paper no. 07. Available at: http://www.viam-works.ru (accessed: June 02, 2024). DOI: 10.18577/2307-6046-2024-0-5-71-82.
  6. Startsev V.O., Nechaev A.A. The influence of natural and accelerated weathering on the nanomodified CFRP’S strength. Aviation materials and technologies, 2023, no. 3 (72), paper no. 11. Available at: http://www.journal.viam.ru (accessed: May 10, 2024). DOI: 10.18577/2713-0193-2023-0-3-134-151.
  7. Whiteside M., Herndon J.M. Unequivocal Detection of Solar Ultraviolet Radiation 250–300 nm (UV-C) at Earth's Surface. European Journal of Applied Sciences, 2023, vol. 11, no. 2, pp. 455–472. DOI: 10.14738/aivp.112.14429.
  8. Kasatkin A.G. Basic processes and apparatus of chemical technology. Ed. 7th. Moscow: State Sci.-tech. Chem. Publ. House, 1985, 830 p.
  9. Mikheev M.A., Mikheeva I.M. Basics of Heat Transfer. Ed. 2nd, stereotype. Moscow: Energiya, 1977, 344 p.
  10. Mikheev M.A., Mikheeva I.M. A short course in heat transfer. Moscow: Publ. House of the USSR Academy of Sciences, 1960, pp. 33–55.
  11. Shirokov M.F. Physical foundations of gas dynamics and its application to heat transfer and friction processes. Moscow: Fizmatgiz, 1958, 340 p.
  12. Eckert E., Weise W. Messungen der Temoeraturverteilung auf der Oberfleche schnell angestromter unbeheizter Körper. Forschung Im Ingenieurwesen, 1942, bd. 13, h. 6, ss. 246–254.
  13. Nakorchevsky A.I. Influence of climatic factors on heat transfer in the upper zone of ground heat accumulators. Inzhenerno-fizicheskiy zhurnal, 2012, vol. 85, no. 2, pp. 392–407.
  14. Khramtsov P.P., Penyazkov O.G., Grishchenko V.M. et al. Influence of barrier discharge on the aerodynamic drag of Zhukovsky airfoil under different blowing conditions. Inzhenerno-fizicheskiy zhurnal, 2011, vol. 84, no. 6, pp. 1252–1256.
  15. Golub O.V., Kotov G.V., Fisenko S.P. Modeling of vapor cloud formation in a wind flow with intense evaporation. Inzhenerno-fizicheskiy zhurnal, 2010, vol. 83, no. 4, pp. 757–762.
  16. Kornienko S.V. Increasing the energy efficiency of buildings by improving the methods for calculating the temperature and humidity conditions of enclosing structures: thesis, Dr. Sc. (Tech). Volgograd: VolgGASU, 2018, 380 p.
  17. Lykov A.V. Heat and Mass Transfer: Handbook. Moscow: Energiya, 1978, 480 p.
  18. Perekhozhentsev A.G. Issues of Theory and Calculation of the Humidity State of Heterogeneous Sections of Building Enclosing Structures. Volgograd: VolgGASU, 1997, 273 p.
  19. Kornienko S.V. Moisture potential for determining the moisture state of materials of external enclosures in non-isothermal conditions. Stroitelnye materialy, 2006, no. 4, рр. 88–89.
  20. Bogoslovsky V.N., Gagarin V.G. Moisture potential. Theoretical foundations. Vestnik otdeleniya stroitelnykh nauk Rossiyskoy akademii arkhitektury i stroitelstva, 1996, is. 1, pp. 12–14.
  21. Künzel H.M. Simultaneous Heat and Moisture Transport in Building Components: One- and two-dimensional calculation using simple parameters. Stuttgart: IRB Verlag, 1995, 540 р.
  22. Lakomkin V.Yu., Smorodin S.N., Gromova E.N. Heat and mass transfer equipment of enterprises (drying units): manual. St. Petersburg: VShTE SPbGUPTD, 2016, 142 p.