Prediction of freezing and thawing times for foods of three-dimensional irregular shape by using a semi-analytical geometric factor

Md M. Hossain, D. J. Cleland, A. C. Cleland

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

A new expression for a geometric factor for ellipsoid shapes is developed by applying semi-analytical solutions of phase-change problems with convective cooling at the surface. Testing against finite element predictions for prolate and oblate spheroids showed that the new formula is more accurate than any alternative shape factor for practical ranges of conditions. By use of a model ellipsoid defined as having the same volume, characteristics dimension and smallest orthogonal cross-sectional area as the actual shape in conjunction with the proposed shape factor, published experimental freezing and thawing times of three-dimensional irregular shapes are more accurately predicted that by any other shape factor.

Original languageEnglish
Pages (from-to)241-246
Number of pages6
JournalInternational Journal of Refrigeration
Volume15
Issue number4
DOIs
Publication statusPublished - 1992
Externally publishedYes

Keywords

  • freezing times
  • mathematical model
  • thawing times

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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