2015
DOI: 10.1590/1807-1929/agriambi.v19n3p218-223
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Análise da hidratação de grãos de alpiste

Abstract: R E S U M ONeste trabalho se objetivou estudar o fenômeno de hidratação em grãos de alpiste (Phalaris canariensis L.) em diferentes temperaturas. Foram utilizados grãos secos de alpiste, embebidos em água destilada, nas temperaturas de 10, 25 e 45 °C. O aumento da temperatura resultou em aumento da taxa de absorção de água e o modelo de Peleg se ajustou satisfatoriamente aos dados experimentais. O coeficiente efetivo de difusão aumentou com a variação crescente da temperatura, de 2,396 até 2,428×10 -13 m² s -1… Show more

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Cited by 8 publications
(11 citation statements)
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“…Although they do not usually have theoretical foundation, empirical models are generally simple and easily applied, since they are based on experimental data, dimensional and statistical analyses. Phenomenological models are based on theories and laws, are more complex and involve parameters that reflect the physical nature of the system, which can also be obtained to represent the actual system (Lisbôa et al, 2015).…”
Section: Introductionmentioning
confidence: 99%
“…Although they do not usually have theoretical foundation, empirical models are generally simple and easily applied, since they are based on experimental data, dimensional and statistical analyses. Phenomenological models are based on theories and laws, are more complex and involve parameters that reflect the physical nature of the system, which can also be obtained to represent the actual system (Lisbôa et al, 2015).…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, the results found for the chickpea diffusivity are in a similar range and order (10 −9 to 10 −11 m 2 /s) when compared to the other agriculture products in previous reports. However, Lisbôa, Silva, Cavalcanti, Silva, and Gonçalves (2015) found values ranging from 2.396 a 2.428 × 10 −13 m 2 /s for birdseed grains at temperatures ranging from 10 to 40 ° C.…”
Section: Resultsmentioning
confidence: 98%
“…However , Lisbôa, Silva, Cavalcanti, Silva, and Gonçalves (2015) found values ranging from 2.396 a 2.428 × 10 −13 m 2 /s for birdseed grains at temperatures ranging from 10 to 40 C.…”
Section: Effective Diffusivity Coefficientmentioning
confidence: 92%
“…Já os modelos semiteóricos e os empíricos consideram somente a resistência externa à temperatura e a umidade relativa do ar (Faria et al, 2012). Dentre os modelos teóricos aplicados ao processo de secagem, o da difusão é o mais estudado (Araújo et al, 2017), uma vez que este considera, como mecanismo principal, a difusão baseada na segunda Lei de Fick, que estabelece uma relação entre as taxas de variação temporal e espacial da concentração de água, por meio do coeficiente de difusão (Lisbôa et al, 2015).…”
Section: Introductionunclassified