Determination and Modeling of Thermophysical and Transport Properties of Tropical Pulps
European Journal of Biophysics
Volume 5, Issue 5, October 2017, Pages: 79-88
Received: Jul. 26, 2017; Accepted: Aug. 28, 2017; Published: Dec. 19, 2017
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Authors
Magdiely Stefanes de Santana Varela, Laboratory of Separation Processes in Foods, Department of Chemical Engineering, Federal University of Rio Grande do Norte, Natal, Brazil
Gabriela Cecília Remigio Pitombeira, Laboratory of Separation Processes in Foods, Department of Chemical Engineering, Federal University of Rio Grande do Norte, Natal, Brazil
Ana Cláudia Nascimento Silva, Laboratory of Separation Processes in Foods, Department of Chemical Engineering, Federal University of Rio Grande do Norte, Natal, Brazil
Camila Gambini Pereira, Laboratory of Separation Processes in Foods, Department of Chemical Engineering, Federal University of Rio Grande do Norte, Natal, Brazil
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Abstract
The objective of this work was to determine the thermophysical and transport properties of Hancornia speciosa G. (“mangaba”), Annona muricata L. (“graviola”), Eugenia uniflora Berg (“pitanga”) pulps. The following properties were evaluated: thermal diffusivity, thermal conductivity, heat capacity, density and coefficient of thermal expansion. Rheological properties were determined and adjusted to three models. The effect of temperature on the rheological behavior was also evaluated. The pulps were further characterized in relation to humidity, ºBrix, water activity, surface tension, pH and total acidity. The results indicated agreement with literature in relation to thermophysical and transport properties, and the pulps presented a pseudoplastic behavior. Temperature influenced the pulps properties in different aspects: higher effect on the coefficient of thermal expansion of mangaba pulp, higher effect on the rheological behavior of pitanga pulp. The results presented an important advance for the knowledge of food fluids, being necessary for the processing of these materials.
Keywords
Tropical Exotic Pulps, Modeling, Thermophysical and Transport Properties, Rheological Behavior
To cite this article
Magdiely Stefanes de Santana Varela, Gabriela Cecília Remigio Pitombeira, Ana Cláudia Nascimento Silva, Camila Gambini Pereira, Determination and Modeling of Thermophysical and Transport Properties of Tropical Pulps, European Journal of Biophysics. Vol. 5, No. 5, 2017, pp. 79-88. doi: 10.11648/j.ejb.20170505.11
Copyright
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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