scholarly journals Transport Coefficients of van der Waals Fluid Mixtures Near the Critical Point

1973 ◽  
Vol 49 (4) ◽  
pp. 1372-1374 ◽  
Author(s):  
B. Cichocki
Keyword(s):  
Critical Point ◽  
Van Der Waals ◽  
Transport Coefficients ◽  
Fluid Mixtures ◽  
Van Der Waals Fluid

scholarly journals Thermodynamic Curvature of the Binary van der Waals Fluid

Entropy ◽  
2020 ◽  
Vol 22 (11) ◽  
pp. 1208
Author(s):  
George Ruppeiner ◽  
Alex Seftas
Keyword(s):  
Binary Mixture ◽  
Ricci Curvature ◽  
Van Der Waals ◽  
Curvature Scalar ◽  
Fluid Regime ◽  
Binary Fluid ◽  
Fluid Mixtures ◽  
Van Der Waals Fluid ◽  
Binary Fluid Mixtures ◽  
Thermodynamic Curvature

The thermodynamic Ricci curvature scalar R has been applied in a number of contexts, mostly for systems characterized by 2D thermodynamic geometries. Calculations of R in thermodynamic geometries of dimension three or greater have been very few, especially in the fluid regime. In this paper, we calculate R for two examples involving binary fluid mixtures: a binary mixture of a van der Waals (vdW) fluid with only repulsive interactions, and a binary vdW mixture with attractive interactions added. In both of these examples, we evaluate R for full 3D thermodynamic geometries. Our finding is that basic physical patterns found for R in the pure fluid are reproduced to a large extent for the binary fluid.

On the transport properties of a Van der Waals gas near the critical point

1968 ◽  
Vol 46 (24) ◽  
pp. 2821-2841 ◽  
Author(s):  
Luis de Sobrino
Keyword(s):  
Thermal Conductivity ◽  
Time Dependence ◽  
Critical Point ◽  
Bulk Viscosity ◽  
Shear Viscosity ◽  
Van Der Waals ◽  
Transport Coefficients ◽  
Hydrodynamic Equations ◽  
Van Der Waals Gas ◽  
Critical Fluctuations

A calculation of the critical anomalies of the transport coefficients of a simple fluid based on a microscopic model of a nonequilibrium Van der Waals gas is presented. It is found that, in the gas region, the anomalous bulk viscosity behaves as (T – Tc)−2. Both the anomalous thermal conductivity and shear viscosity behave as In (T – Tc)−1, but the anomaly in the shear viscosity is much smaller than the anomaly in the thermal conductivity. The results appear to indicate that previous calculations, in which the time dependence of the critical fluctuations is obtained from hydrodynamic equations, are not valid.

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