One parameter friction theory models for viscosity

摘要: In this work the friction theory (f-theory) for viscosity modeling is used in conjunction with SRK, PR and PRSV cubic equations of state order to develop three one parameter general models prediction. The are considered because they only require a characteristic critical velocity, which normally not tabulated. use these rather simple as basis obtain accurate fluids wide ranges temperature pressure. presented based on behavior n-alkanes from methane n-octadecane. Although best performance obtained n-alkanes, good model also other systems. Thus, recommended values several systems reported work. However, case an empirical equation provided so that no additional parameters required. addition, mixing rules, binary quaternary n-alkane mixtures can be predicted satisfactory accuracy.