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The air viscosity coefficient and other related values

Abstract

Experimental measurements of the dynamic coefficient of air viscosity were done. Numerous other related values such as the kinematic coefficient of air viscosity, the mean free path and the mean thermal square velocity of air molecules were determined. The dependence of the air dynamic viscosity coefficient on temperature was also obtained. It allowed us to determine the Sutherland’s corrections and to estimate the dimension of air molecules and the temperature gradients of the dynamic and kinematic coefficients of the air viscosity. The determined values were compared to the similar theoretical and experimental data obtained by other authors.


Article in English.


Oro klampumo koeficientas ir kiti susieti dydžiai


Santrauka


Buvo atlikti eksperimentiniai oro klampos koeficiento matavimai. Matuojant buvo nustatytos kitų susijusių dydžių eksperimentinės vertės: oro klampumo kinematinis koeficientas, vidutinis laisvasis kelias ir vidutinis oro molekulių šiluminis kvadratinis greitis. Taip pat gauta oro dinaminio klampos koeficiento priklausomybė nuo temperatūros. Gautosios vertės leido nustatyti Sazerlendo pataisas, įvertinti oro molekulių matmenis, taip pat oro klampos dinaminių ir kinematinių koeficientų temperatūros gradientus. Vertės palygintos su kitų autorių gautais teoriniais ir eksperimentiniais rezultatais.


Reikšminiai žodžiai: oro klampa, vidutinis šiluminis greitis, vidutinis laisvasis kelias, oro tankis, Sazerlendo pataisos, molekulių matmenys.

Keyword : air viscosity, mean thermal velocity, mean free path, air density, Sutherland’s corrections, dimension of molecules

How to Cite
Balevičius, R., & Miškinis, P. (2020). The air viscosity coefficient and other related values. Mokslas – Lietuvos Ateitis / Science – Future of Lithuania, 12. https://doi.org/10.3846/mla.2020.13767
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Nov 3, 2020
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