Titre :
|
Prediction of freezing time for shrimp blocks by numerical modelling
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Auteurs :
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S. Mishra ;
S. Bandyopadhyay
|
Type de document :
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article/chapitre/communication
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Année de publication :
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1999
|
Format :
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p. 500-505
|
Langues:
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= Anglais
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Catégories :
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TECHNIQUE FRIGORIFIQUE
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Mots-clés:
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CONGELATION
;
VITESSE DE CONGELATION
;
MODELE NUMERIQUE
;
TRANSFERT DE CHALEUR
;
CRUSTACE
|
Résumé :
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A three-dimensional numerical heat transfer model formulated through a combined fully implicit (FI) and Crank-Nicolson (C-N) schemes was validated with freezing of shrimp and Tylose blocks carried out in a laboratory freezing unit under various experimental conditions. The model predicted the time-temperature profiles fairly well with the help of a computer program based on a single algorithm. The C-N scheme provided an accuracy of prediction better than the FI scheme for all the freezing conditions and with Tylose blocks. Prediction by C-N model (5.6-13.2%) in case of shrimp blocks. The correlation coefficient between the experimental and predicted temperature during shrimp block freezing was better with C-N model (0.95-0.97) than that with FI model (0.93-0.95). Similar results were obtained with Tylose blocks. Refinement of spatial interval and time increment improved further the accuracy of prediction, but with a higher computational time and memory.
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Source :
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Journal of food science and technology : (Mysore), vol.36, n°6
|