Artículos de revistas
Discretisation of the non-linear heat transfer equation for food freezing processes using orthogonal collocation on finite elements
Registro en:
Brazilian Journal of Chemical Engineering. Brazilian Society of Chemical Engineering, v. 24, n. 3, p. 399-409, 2007.
0104-6632
S0104-66322007000300009
10.1590/S0104-66322007000300009
Autor
Resende, E. D.
Kieckbusch, T. G.
Toledo, E. C. V.
Maciel, M. R. W.
Institución
Resumen
The freezing process is considered as a propagation problem and mathematically classified as an initial value problem. The mathematical formulation involves a complex situation of heat transfer with simultaneous changes of phase and abrupt variation in thermal properties. The objective of the present work is to solve the non-linear heat transfer equation for food freezing processes using orthogonal collocation on finite elements. This technique has not yet been applied to freezing processes and represents an alternative numerical approach in this area. The results obtained confirmed the good capability of the numerical method, which allows the simulation of the freezing process in approximately one minute of computer time, qualifying its application in a mathematical optimising procedure. The influence of the latent heat released during the crystallisation phenomena was identified by the significant increase in heat load in the early stages of the freezing process. 399 409 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)