کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
223718 464395 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical simulation of lyophilization of carrot slices at atmospheric pressure in a fluidized bed
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Numerical simulation of lyophilization of carrot slices at atmospheric pressure in a fluidized bed
چکیده انگلیسی

Two-dimensional numerical simulations were carried out to describe the lyophilization process at atmospheric pressure and its optimization. The finite differences method succeeded in describing correctly the complex motion of the sublimation interface in foodstuff. Comparison of unidirectional and bidirectional mass and energy transport showed considerable differences in the drying kinetics. These differences decreased as the geometric ratio (GR) decreased and the physical situation approached to that of an infinite plate. The temperature and vapor pressure distributions were analyzed as functions of ice saturation. Two-dimensional numerical simulations showed a good fit with the experimental data.


► Lyophilization at atmospheric pressure was described by two-dimensional numerical models.
► The finite differences method described correctly the motion of the sublimation interface in food.
► Temperature and vapor pressure fields were analyzed as functions of ice saturation.
► Uni- and bi-directional mass and energy transport considerably differed in drying kinetics.
► Two-dimensional numerical simulations showed a good fit with the experimental data.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Food Engineering - Volume 109, Issue 4, April 2012, Pages 659–667
نویسندگان
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