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Arrhenius equation |
(1) |
\ln {\mu}_{12} = x_1 \cdot \ln {\mu}_1 + x_2 \cdot \ln {\mu}_2 |
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Lederer-Roegiers equation |
(2) |
\ln {\mu}_{12} = \frac{x_1}{x_1 + \alpha \, x_2} \cdot \ln {\mu}_1 + \frac{\alpha \, x_2}{x_1 + \alpha \,x_2} \cdot \ln {\mu}_2 |
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(3) |
\ln {\mu}_{12} = x_1 \cdot \ln {\mu}_1 + x_2 \cdot \ln {\mu}_2 + \epsilon \, x_1 \, x_2 |
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Oswal-Desai equation |
(4) |
\ln {\mu}_{12} = x_1 \cdot \ln {\mu}_1 + x_2 \cdot \ln {\mu}_2 + \epsilon \, x_1 \, x_2 + K_1 \, x_1 \, x_2 \, (x_1 - x_2) + K_2 \, x_1 \, x_2 \, (x_1 - x_2)^2 |
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The Lederer-Roegiers equation is reported to be the most accurate among single-variable models.
See also
Physics / Fluid Dynamics / Mixing Rules
References
Boris Zhmud, Viscosity Blending Equations, Lube-tech, 121, 2014