Non-uniform Heat Transfer During Air-Blast Freezing of a Fruit Pulp Model in Multilayer Boxes

Resende, Jaime Vilela de; Prado, Mônica Elisabeth Torres; Silveira, Vivaldo

doi:10.1007/s11947-011-0757-6

Cited by 7 publications

(1 citation statement)

References 18 publications

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“…The product can have a standard form and size, but this rarely occurs. The external heat transfer may be constant across the entire surface of the product; however, wide variations in the heat transfer coefficients, mainly the convective heat transfer coefficient, may occur in different positions (Pham and Willix, 1987;Reno et al, 2011;Resende et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Heat transfer analyses using computational fluid dynamics in the air blast freezing of guava pulp in large containers

Okita

Reno

Peres

et al. 2013

Braz. J. Chem. Eng.

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-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 crosssection 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.

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Section: Introductionmentioning

confidence: 99%