Estimativa da viscosidade de misturas de biodiesel por métodos de contribui o de grupo

Knowing fuel properties is of fundamental importance during the design of sprinklers and others engine components. Group contribution methods are important skills for predicting properties of innumerable types of compounds because they enable the representation of an immense quantity of mixtures. In this work, viscosities of both pure biodiesels and blends derived from various oleaginous plants were estimated. To accomplish this, three group contribution estimation methods were evaluated, one of them being specific for fatty compounds. The mixture was simulated according to two mixing rules, and the precision of the methods were compared to the experimental data. The estimates agree with experimental values and hence confirm their applicability in engineering problems and engine design.