Related Experiment Video
Updated: Sep 12, 2025

Author Spotlight: Employing Green-Chemistry Principles for Safe and Sustainable Synthesis of Biodiesels
Published on: April 19, 2024
A New Method for Predicting the Liquid Dynamic Viscosity of Biodiesel-Related Esters Based on the Corresponding State
Maxwell Risseli Laurentino da Silva1,2, Alanderson Arthu Araújo Alves2,3, Nathan Sombra Evangelista4
1Departamento de Engenharia Química, NUPEG, Universidade Federal do Rio Grande do Norte, Campus Universitário, Lagoa Nova, 59078-970 Natal, Rio Grande do Norte, Brazil.
Abstract:
This work proposes a new model based on the three-parameter corresponding states principle (CSP) for estimating the dynamic viscosity of biodiesel-related esters in the liquid state. A Tait-like equation was employed to extend the model to high-pressure conditions. The model's parameters were fitted to 249 experimental viscosity data points from 11 biodiesel-related esters, with 204 obtained under high-pressure conditions. The average absolute relative deviations were 7.94% for high-pressure conditions and 12.95% for atmospheric conditions. The proposed method was rigorously compared with 13 of the most consolidated models available in the literature for the same property (9 based on the group contribution concept, 3 based on the CSP, and 1 based on both methodologies). Considering all criteria of accuracy and physical consistency, the proposed model is recommended for future applications.
Related Concept Videos
Viscosity
The SI unit of viscosity is...
Surface Tension, Capillary Action, and Viscosity
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
Viscosity of Fluid
Distillation: Vapor–Liquid Equilibria
Intermolecular Forces and Physical Properties
Stokes' Law
The expression for the force on a solid spherical object in a fluid is called Stokes' law. Stokes' law is valid only...

