Correlation of high-pressure diffusion and viscosity coefficients for n-alkanes

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

“…This idea was extended in [5,6] by assuming that a corresponding states relationship exists between the experimental transport properties of rough non-spherical molecules and the smooth hard-sphere values (subscript shs). Since the experimental viscosity is proportional to the exact hard-sphere value, the following relation can be defined…”

“…In order to avoid the direct calculation of the viscosity, Dymond [29] found it convenient to express the viscosity as reduced quantities. Based on this, Dymond and Awan [5] derived the following expression relating the reduced smooth hard-sphere viscosity g à shs to the experimental value g exp :…”

“…Five different models with a physical and theoretical background are studied. The considered models are the well-known hard-sphere-scheme [5,6], the free-volume approach [7][8][9], the self-referencing model [10,11], the friction-theory [12,13] and a molecular dynamics approach [14]. In addition to these models, the simple mixing laws of Grunberg-Nissan [15] and Katti-Chaudhri [16] are also applied in the representation of the viscosity behavior of this binary system.…”

Dynamic Viscosity for HFC-134a + Polyether Mixtures up to 373.15 K and 140 MPa at Low Polyether Concentration. Measurements and Modeling

“…This model has been developed 45,46 where i and m subscript are used for pure compounds and mixture, respectively.…”

Comparative experimental and modeling studies of the viscosity behavior of ethanol+C7 hydrocarbon mixtures versus pressure and temperature

“…These data as well as those recently measured for ethanol + toluene [4] are used in a study of the performance of some viscosity models with a physical and theoretical background. The evaluated models are based on the hard-sphere scheme [5,6], the concepts of the free-volume [7,8] and the friction theory [9,10], and a model derived from molecular dynamics simulations [11]. In addition to these models, the simple compositional models by Grunberg and Nissan [12] and Katti and Chaudhri [13] are also applied in the representation of the viscosity behavior of these ethanol + C 7 hydrocarbon systems.…”