Thermal properties determination of a cylindrical product during its cooling: two-dimensional numerical model and uncertainty

Autor:	Wilton Pereira da Silva, Cleide Maria D. P. S. e Silva, Leidjane Matos De Souto, Josivanda Palmeira Gomes, Alexandre J. M. Queiroz, Rossana M. F. De Figueiredo
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	thermal diffusivity convective heat transfer coefficient uncertainties covariance matrix numerical solution cooling Nutrition. Foods and food supply TX341-641 Food processing and manufacture TP368-456
Zdroj:	International Journal of Food Properties, Vol 22, Iss 1, Pp 343-354 (2019)
Druh dokumentu:	article
ISSN:	1094-2912 1532-2386 10942912
DOI:	10.1080/10942912.2019.1578791
Popis:	In this article, a two-dimensional model is proposed to determine thermal diffusivity and convective heat transfer coefficient, providing the average values, their uncertainties and the covariance matrix referring to these parameters for a product with cylindrical geometry during its cooling. The proposed model used a two-dimensional numerical solution of the diffusion equation for the direct problem; an experimental dataset referring to the cooling kinetics in the center of the product and an optimizer program based on the Levenberg-Marquardt algorithm for the inverse problem. The model was used with success to determine the thermal properties, their uncertainties and the covariance matrix of a cucumber during its cooling. The obtained results allowed establishing a confidence band that made it possible to graphically evaluate the precision of a new simulation for a cucumber with different dimensions.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/e07d1df932d74f0f9b544d72ed2b324b Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF Plný text ve formátu HTML
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