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基于指数型扩散系数的多孔材料干燥传质模型研究

张通千

张通千. 基于指数型扩散系数的多孔材料干燥传质模型研究[J]. 矿业科学学报, 2020, 5(6): 648-654. doi: 10.19606/j.cnki.jmst.2020.06.007
引用本文: 张通千. 基于指数型扩散系数的多孔材料干燥传质模型研究[J]. 矿业科学学报, 2020, 5(6): 648-654. doi: 10.19606/j.cnki.jmst.2020.06.007
Zhang Tongqian. Investigation on mass transfer model of drying of porous materials based on exponential diffusion coefficient[J]. Journal of Mining Science and Technology, 2020, 5(6): 648-654. doi: 10.19606/j.cnki.jmst.2020.06.007
Citation: Zhang Tongqian. Investigation on mass transfer model of drying of porous materials based on exponential diffusion coefficient[J]. Journal of Mining Science and Technology, 2020, 5(6): 648-654. doi: 10.19606/j.cnki.jmst.2020.06.007

基于指数型扩散系数的多孔材料干燥传质模型研究

doi: 10.19606/j.cnki.jmst.2020.06.007
详细信息
    作者简介:

    张通千(1986—),男,山东青岛人,博士研究生,主要从事环境功能材料方面的研究工作。Tel:15689928187,E-mail: TQZhang1986@163.com

Investigation on mass transfer model of drying of porous materials based on exponential diffusion coefficient

  • 摘要: 建立含水状态下矿物类多孔材料干燥传质数学模型,对于了解多孔矿物材料内部水分分布以及优化材料干燥参数有重要意义。本文在Lewis-Scherwood干燥模型基础上,采用了动态水汽化潜热值和指数型质扩散系数,建立了改良后表面对流干燥条件下的多孔材料水分一维扩散热质传递模型,通过对3种含水多孔材料试样在表面对流干燥条件下材料内部含水量下降的实验值与计算值的对比,确定了一维扩散模型计算值平均相对误差为46%。将改良模型和传统模型的计算结果分别与含水多孔材料试样干燥实验结果进行对比,验证了新模型较传统模型具有更高精度。新模型适用于预测多孔矿物材料内水分分布,为研究不同干燥环境下多孔矿物材料内部含水量预测方法提供了借鉴。
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  • 刊出日期:  2020-12-31

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