Abstract
Ionic liquids (ILs) have been of particular interest to researchers in recent years. Viscosity is considered as one of the most important thermophysical properties of ILs. This paper uses a genetic programming approach to propose a simple equation, with only one parameter to adjust, for predicting the viscosity of pure ILs and their binary mixtures as a function of temperature. The adjustable parameter of the equation was calculated for 103 pure ILs. The average absolute relative deviation of 4.60% obtained for 1374 data points confirms the good accuracy of the model. Also, an acceptable average absolute relative deviation of 12.83% at temperatures outside of the temperature range used to develop the model confirms the reliability of the model in the extrapolation of the temperature effect. To predict the viscosity of the binary mixture of ionic liquids by the proposed equation, the volumetric average of the parameter was applied to the proposed equation without introducing any new adjustable parameter. T...
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