粮油食品科技

中国科技核心期刊

粮仓内水分和温度变化的数值模拟分析
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Numerical simulation analysis of moisture and temperature in grain silo
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    摘要:

    采用数值模拟的方法对粮仓内温度和水分随时间的变化进行研究。在数值模拟过程中,对真实粮仓进行一定的简化,建立了相似的物理模型,并与经典实验做对比,验证模型的可靠性。根据多孔介质的局部热质平衡原理和体积平均法,对不同初始温度的粮堆进行数值模拟分析,获得了粮食内部水分和温度随时间的变化规律。当温差从20 ℃增加到40 ℃时,粮仓内水分和温度变化也随之加剧。研究结果为预防粮食在储存过程中发生霉变、结露提供了科学依据。

    Abstract:

    The temperature and moisture in grain silo changed along with time was researched by means of numerical simulation. In the process of simulation,the real grain storage silo was simplified, thereby a similar physical model was established and compared with the classic experiment, the reliability of the model was validated. Based on local heat and mass balance principle and volume average method, different initial temperatures in grain stack were analyzed by numerical simulation. The variation of temperature and moisture was obtained. When the temperature difference increased from 20 ℃ to 40 ℃, the moisture and temperature in the grain silos also changed significantly. The results of the study provides scientific basis for preventing mildew and moisture condensation during grain storage.

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张中涛,王远成,亓伟,马金剑.粮仓内水分和温度变化的数值模拟分析[J].粮油食品科技,2014,22(6):106-109.

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  • 在线发布日期: 2014-12-29
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