Viscosity and Density Estimation of Ternary Solution Based on Recursive B-Spline Method

Abstract

Online viscosity and density estimation of ternary solution with sucrose and sodium chloride means a lot in osmotic dehydration of food. The authors proposed a novel B-spline method using recursive least squares to estimate viscosity and density using concentrations of the two solutes and temperature. A 4-D B-spline is established to estimate viscosity with the inputs of sucrose concentration, sodium chloride concentration and temperature. And a 3-D B-spline is also established to estimate density in a fixed temperature. The maximum relative errors of viscosity and density estimation are 0.0062% and 1.33×10-5% respectively which show that the method is of high accuracy and suitable for practical application.