An Enskog Correction for Size and Mass Difference Effects in Mixture Viscosity Prediction

Area of Science:

• Thermodynamics
• Fluid Dynamics
• Physical Chemistry

Background:

• The one-fluid conformal solution model is a theoretical framework for predicting fluid properties.
• Existing models often neglect molecular size and mass differences, limiting accuracy for real mixtures.
• Accurate viscosity prediction is crucial for chemical engineering and materials science.

Purpose of the Study:

• To develop a corrected viscosity model for binary mixtures.
• To account for molecular size and mass disparities within the conformal solution framework.
• To validate the model against experimental viscosity data.

Main Methods:

• The study employs a correction method based on the Enskog model for hard sphere mixtures.
• The approach integrates equilibrium theory with empirical transport corrections.
• Viscosity predictions were compared with experimental data for 24 binary mixtures.

Main Results:

• The proposed correction method significantly improves viscosity predictions.
• The model accurately represents the behavior of binary mixtures with varying molecular characteristics.
• Discrepancies between predicted and experimental viscosities were reduced.

Conclusions:

• The corrected one-fluid conformal solution viscosity model offers enhanced accuracy for binary mixtures.
• Accounting for size and mass effects is essential for precise viscosity modeling.
• This method provides a valuable tool for predicting transport properties in complex fluid systems.