An Optimized Model for Predicting Kinematic Viscosities of Biodiesel Fuels

In this work, the empirical correlations for viscosity and temperature of biodiesel fuels have been optimized. In order to achieve this, an optimized empirical correlation is proposed and the predicted values are found to be in good agreement with the experimental data. The optimized empirical correlation has the advantages of small relative error, small error range and no obvious error fluctuations. On the basis of the proposed correlation, the concepts of viscosity gradient of biodiesels and critical preheating temperature of biodiesels are proposed in this paper. The viscosity gradient, the critical preheating temperature and the range of applications for three kinds of biodiesel fuels are obtained by analyzing their viscosity data.