A Hard-Sphere Scheme Used to Model the Viscosity of Two Ternary Mixtures up to 100 MPa

Stereoisomeric effects on dynamic viscosity versus pressure and temperature for the system cis-+trans-decalin

“…It seems that the a g,i coefficients are universal, as checked in [33], independent of the chemical structure of the compound and are given in [6]. For various pure compounds it has been observed that v 0 is temperature dependent whereas R g is temperature independent for pseudo-spherical molecules, such as n-alkanes, but shows a temperature dependency for molecules that either depart too much from sphericity or have hydrogen bonds, such as alcohols [31].…”

“…But the mixture energy parameter will be dependent on the composition, but not on the molecular length, although this property is included in the calculation of the mixture energy parameter, see Eqs. (31) and (33).…”

“…Notice that if we use for the cross-molecular parameters r ij and e ij (Eqs. (32) and (33) and Eqs. (2) and (3) of Ref.…”

“…Additionally, for mixtures, Eqs. (32) and (33), are used to define the cross-molecular parameters, and then Eqs. (30) and (31) are applied for the calculation of the equivalent ''pseudo-component'' representative of the mixture.…”

Comparative study of viscosity models on the ternary system methylcyclohexane + cis-decalin + 2,2,4,4,6,8,8-heptamethylnonane up to 100MPa

“…This has been verified by Baylaucq et al [24,25]. It is generally assumed for pseudo-spherical molecules, such as n-alkanes, that v 0 is temperature dependent, whereas R η is temperature independent [26].…”