4. Reduced double collision integrals
Viscosity and diffusion involve the integrals Ω (2,2)* and Ω (1,1)* respectively. To calculate them, we make an assumption about the type of potential, 12-6 of Lennard-Jones (cf. article Thermodynamic data of fluids ) for non-polar gases and Stockmayer's 12-6-3 for polar gases.
4.1 Non-polar gases
The evaluation of integrals for the Lennard-Jones potential has been done by many researchers, who have given their results in the form of tables. To enter the values into a computer, it is preferable to have an analytical expression. Neufeldet alii
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Reduced double collision integrals
Determining the properties of non-polar pure gases
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