Numerical simulation and experimental verification of the effect by hot air drying on heat and mass transfer of Camellia oleifera seed

IF 3.5 2区农林科学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Food and Bioproducts Processing Pub Date : 2025-07-12 DOI:10.1016/j.fbp.2025.07.004

Fenghe Wang , Yanfan Di , Bojian Wang , Huijuan Chen , Mingfei Li , Qian Lu , Xiaowei Zhang , Deyong Yang

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Abstract

By constructing model of heat and mass transfer and shrinkage, the thin layer hot-air drying process of Camellia oleifera seed was using COMSOL Multiphysics simulation software. The simulation results indicate that the temperature at the center of Camellia oleifera seed kernel was always lower than the hot air temperature, and the variation pattern closely matched of the simulated temperature at the center was basically the same as the experimental value, with a maximum deviation of 11.2 % and an average deviation of 6.4 %. In the early stage of simulation, the moisture content of Camellia oleifera seed decreased rapidly, and there was a significant difference in internal and external moisture content. The maximum deviation between simulated and experimental values was 11.8 %, and the average deviation was 8.7 %. The radius of Camellia oleifera seed kernel decreased over time with the extension of simulation time, and the decreasing trend was obvious in the early stage, while it was relatively gentle in the later stage. The average deviation between the simulated and experimental values was 3.2 %, with a maximum deviation of 6.0 %, indicated the simulated drying results of Camellia oleifera seed were consistent with the actual drying law.

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热风干燥对油茶种子传热传质影响的数值模拟与实验验证

通过建立传热传质和收缩模型，利用COMSOL Multiphysics软件对油茶种子薄层热风干燥过程进行模拟。模拟结果表明，油茶种仁中心温度始终低于热风温度，模拟中心温度的变化规律与实验值基本吻合，最大偏差为11.2 %，平均偏差为6.4 %。在模拟前期，油茶种子含水率迅速下降，且内外含水率差异显著。模拟值与实验值的最大偏差为11.8 %，平均偏差为8.7 %。随着模拟时间的延长，油茶种仁半径随时间减小，前期减小趋势明显，后期减小趋势相对平缓。模拟值与实验值的平均偏差为3.2 %，最大偏差为6.0 %，说明油茶种子的模拟干燥结果与实际干燥规律吻合。

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来源期刊

Food and Bioproducts Processing 工程技术-工程：化工

CiteScore

9.70

自引率

4.30%

发文量

115

审稿时长

24 days

期刊介绍： Official Journal of the European Federation of Chemical Engineering: Part C FBP aims to be the principal international journal for publication of high quality, original papers in the branches of engineering and science dedicated to the safe processing of biological products. It is the only journal to exploit the synergy between biotechnology, bioprocessing and food engineering. Papers showing how research results can be used in engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in equipment or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of food and bioproducts processing. The journal has a strong emphasis on the interface between engineering and food or bioproducts. Papers that are not likely to be published are those: • Primarily concerned with food formulation • That use experimental design techniques to obtain response surfaces but gain little insight from them • That are empirical and ignore established mechanistic models, e.g., empirical drying curves • That are primarily concerned about sensory evaluation and colour • Concern the extraction, encapsulation and/or antioxidant activity of a specific biological material without providing insight that could be applied to a similar but different material, • Containing only chemical analyses of biological materials.