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Título: Heat transfer analyses using computational fluid dynamics in the air blast freezing of guava pulp in large containers
Autor(es): Okita, W. M.
Reno, J.M.
Peres, A.P.
Resende, J.V.
Assunto: Fluidodinâmica computacional
Transferência de calor
Polpa de frutas
Airflow
Heat transfer
Fruit pulp
Freezing time
Publicador: ABEQ
Data de publicação: 2013
Referência: OKITA, W. M. et al. Heat transfer analyses using computational fluid dynamics in the air blast freezing of guava pulp in large containers. Brazilian Journal of Chemical Engineering, São Paulo, v. 30, n. 4, p. 811-824, Oct./Dec. 2013.
Abstract: Heat transfer during the freezing of guava pulp conditioned in large containers such as in stacked boxes (34 L) and buckets (20 L) and unstacked drums (200 L) is discussed. The air velocities across the cross-section of the tunnel were measured, and the values in the outlet of the evaporator were used as the initial conditions in computational fluid dynamics (CFD) simulations. The model tested was turbulent standard k-ε. The CFD-generated convective heat transfer coefficients were mapped on the surfaces for each configuration and used in procedures for the calculation of freezing-time estimates. These estimates were compared with the experimental results for validation. The results showed that CFD determined representative coefficients and produced good correlations between the predicted and experimental values when applied to the freezing-time estimates for the box and drum configurations. The errors depended on the configuration and the adopted mesh (3-D grid) construction.
URI: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322013000400013&lng=en&nrm=iso&tlng=en
http://repositorio.ufla.br/jspui/handle/1/1685
Idioma: en
Aparece nas coleções: DCA - Artigos publicados em periódicos

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