Abstract
The range of frequency dispersion for dynamic coefficient of shear viscosity η S (ω) of electrolyte solutions obtained through kinetic equations under the condition of recovering the steady-state structure of a liquid exponentially or according to the diffusion law is considered. Numerical calculations of η S (ω) are performed for an aqueous solution of NaCl depending on density ρ, temperature T, concentration C, and frequencies ω to select the potential of intermolecular interaction Φ ab (|r|) and equilibrium radial distribution function g ab (|r|). It is noted that the calculated theoretical results of η S (ω) are in quantitative accordance with the experimental data. It is shown that the range of frequency dispersion η S (ω) based on the diffusion mechanism is broad (∼105 Hz) and is narrow in the case of exponential attenuation of the viscous stress tensor (∼102 Hz); this corresponds to both acoustic measurements and results from phenomenological theory.
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Original Russian Text © S. Odinaev, D.M. Akdodov, 2013, published in Zhurnal Fizicheskoi Khimii, 2013, Vol. 87, No. 7, pp. 1154–1159.
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Odinaev, S., Akdodov, D.M. Ranges of frequency dispersion for the shear viscosity coefficients of aqueous solutions of electrolytes. Russ. J. Phys. Chem. 87, 1129–1134 (2013). https://doi.org/10.1134/S0036024413060198
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DOI: https://doi.org/10.1134/S0036024413060198