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Generalized numerical modelling of unsteady heat transfer during cooling and freezing using an improved enthalpy method and quasi one-dimensional formulation.

Author(s) : FIKIIN K. A.

Summary

A numerical solution of a generalized Stefan problem is presented. It covers a great variety of unsteady heat conduction cases accompanied by phase transformations. A mathematical model is developed for determination of the unsteady-state temperature and enthalpy fields and of the cooling and freezing times of food materials and other bodies of various configuration. An improved enthalpy method is proposed by which all nonlinearities, caused by the temperature dependence of the thermophysical coefficients, are introduced in a functional relationship between the volumetric specific enthalpy and the Kirchhoff function. Experimental verification demonstrating the applicability and accuracy of the model is carried out.

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Pages: p 343-360

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Details

  • Original title: Generalized numerical modelling of unsteady heat transfer during cooling and freezing using an improved enthalpy method and quasi one-dimensional formulation.
  • Record ID : 1996-0948
  • Languages: English
  • Source: New Applications of Refrigeration to Fruit and Vegetables Processing.
  • Publication date: 1994/06/08
  • Document available for consultation in the library of the IIR headquarters only.

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