Mathematical modeling of glycerol aqueous solutions thermophysical properties. Case study of density and viscosity

Authors:
Andrei Ionuţ Simion, Cristina-Gabriela Grigoraş, Lucian Gavrilă

Volume 21, Issue 2;
Pages: 125-135; 2015
ISSN: 2069-0053 (print) (former ISSN: 1453-1399), Agroprint;
ISSN (online): 2068-9551
Abstract:
Purified glycerol resulted from various processes is mixed with water in different proportions and successfully employed in food industry as humectant, solvent, sweetener, preservative agent etc. Thermophysical properties of glycerol aqueous solutions are needed to determine information required to design and optimize the industrial equipment. Through this paper several mathematical connections were established between density and viscosity of glycerol aqueous solutions and two main parameters influencing their behavior: temperature and concentration. For both mentioned properties concentration varied from 0 to 100%. For temperature, ranges between 288.15 and 303.15 K for density and between 233.15 and 373.15 K for dynamic viscosity were considered. The regressions analysis conducted indicated no statistical differences between existing data and those obtained with developed models. This fact is sustained also by the values registered for the correlation coefficient which were higher than 0.96 for all the resulted equations suggesting a good fit with published data
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