基于连续介质理论,建立了多孔材料干燥组织非稳态收缩递推模型.将物料整体体积随平均干基含水率变化的一维线性关系应用于物料各离散单元所采用的递推模型与整体收缩模型,证明了物料外边界尺寸收缩的一致性.此外,还利用此模型计算了热风对流干燥条件下香蕉组织随干燥时间的变化.结果表明,香蕉在干燥过程中随着水分的对外迁移,水分减少,香蕉组织收缩不是由外至内同步收缩,而是先失水的外部先收缩,不失水的部位不收缩.
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