Calculating the dynamic viscosity of individual substances using the Peng-Robinson equation

High pressure viscosity modeling of pure alcohols based on classical and advanced equations of state

“…Many researchers have studied viscosity of different systems with the Eyring's theory and coupling with different EoSs [8][9][10]. Many researchers have presented different modifications of Eyring's theory [3,7,[11][12][13]. In addition to Eyring's theory which is one of the well-known theories for estimation viscosity of fluids with considering effect of pressure directly, there are some other theories which can estimate viscosity of fluids with considering pressure indirectly such as free volume model [4,5] and the friction theory [2,14].…”

Extension of a Group Contribution Method to Predict Viscosity Based on Momentum Transport Theory Using a Modified Peng–Robinson EoS

“…According to the scientific literature, these sets of substances are representatives that include fluids that have the highest potential to form hydrogen bonding. The overall deviation is below 6.67% in the saturation region and in the single-phase region is below 9.84%. The generalized viscosity model is compared to other literature equations in the saturation and single-phase regions, and the statistical results show that the model generalized in this work provides adequate results and can describe in a wide range of temperatures and pressures, the viscosity of a representative set of substances in comparison to other multiparametric and complex literature models. Further works are needed in order to extend the generalized viscosity model to mixtures using different approaches ,,, and select the most appropriate mixing rule according to different statistical analyses. …”

“…Further works are needed in order to extend the generalized viscosity model to mixtures using different approaches ,,, and select the most appropriate mixing rule according to different statistical analyses.…”

“…For light-hydrocarbons with constant parameters, the model describes the viscosity with deviations below 6.00%. Derevich and collaborators 57 assessed the capabilities of the viscosity model using the Peng−Robinson 58 EoS, exclusively for n-alkanes, nitrogen, and carbon dioxide. Deviations below 6.00% were reported.…”

“…In this regard, the model proposed by Derevich has been selected in this work to develop a generalized viscosity model. The model is selected because it has a low number of adjustable parameters per substance and is capable of describing the viscosity in a wide range of temperatures and pressures according to the literature results. , The description of the procedure used is presented in the following sections.…”