@ARTICLE{Cieśliński_Janusz_Tadeusz_New_2023,
 author={Cieśliński, Janusz Tadeusz and Fabrykiewicz, Maciej and Wiśniewski, Tomasz Stefan and Kubiś, Michał and Smoleń, Sławomir and Eicke, Albrecht and Dutkowski, Krzysztof and Głuszek-Czarnecka, Małgorzata},
 volume={vol. 44},
 number={No 4},
 journal={Archives of Thermodynamics},
 pages={123-139},
 howpublished={online},
 year={2023},
 publisher={The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences},
 abstract={Although there are many methods and instruments for measuring viscosity, it is still difficult to determine a reliable value of the dynamic viscosity of complex chemicals such as paraffins and fatty acids. This is due to the complex and heterogeneous structure of these compounds in the case of commercial products. On the other hand, the measuring instrument should be selected very carefully, including its measuring principle and measuring range. This paper presents results of viscosity measurements of three organic PCMs (phase change materials) obtained in four different research institutions. Commercial products: paraffin, myristic acid (97%) and mixture of palmitic acid (55%) and stearic acid (45%) were selected as PCMs. Four different viscometers, namely Fungilab V-Pad, Rheotest LK 2.2, Rheometer Anton Paar MCR 102, and Brookfield DV-II + Pro have been used to determine temperature dependent dynamic viscosity of the tested PCMs. Using a large database of present measurement results, correlations were developed to calculate the dynamic viscosity of fatty acids and paraffins, which predict the experimental data within a band of ±20%.},
 type={Article},
 title={New empirical correlations for the viscosity of selected organic phase change materials},
 URL={http://www.journals.pan.pl/Content/131162/PDF/art25_607.pdf},
 doi={10.24425/ather.2023.149732},
 keywords={PCM, Viscosity, Viscometers, Temperature, Shear rate},
}