Якісні властивості зсувної в’язкості рідин
In this paper, two theses are substantiated. (i) The viscosity of liquids in the larger part of the temperature interval, where this phase state exists, is governed by frictional effects between the molecular layers that move relative to one another. (ii) Argon and water at temperatures TH <...
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| Date: | 2018 |
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| Main Author: | |
| Format: | Article |
| Language: | Ukrainian English |
| Published: |
Publishing house "Academperiodika"
2018
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| Subjects: | |
| Online Access: | https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018258 |
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| Journal Title: | Ukrainian Journal of Physics |
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Ukrainian Journal of Physics| Summary: | In this paper, two theses are substantiated. (i) The viscosity of liquids in the larger part of the temperature interval, where this phase state exists, is governed by frictional effects between the molecular layers that move relative to one another. (ii) Argon and water at temperatures TH < T < TC (TH ≈ 315 K and TC is the corresponding critical temperature) have kinetic coefficients belonging to the same class of similarity. This is so because the behavior of the shear viscosity in water is driven by the averaged interaction potential between the molecules. On the basis of the similarity principle applied to the corresponding states of water and argon, the self-diffusion and shear viscosity coefficients of water are calculated. The inadequacy of activation mechanisms responsible for the formation of the viscosity and self-diffusion processes in water and most low-molecular liquids is discussed. |
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