A new model for a drying droplet
A new model for a drying droplet
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DOI：
10.1016/j.ijheatmasstransfer.2018.01.094
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发表时间：
2018-07
影响因子：
5.2
通讯作者：
S. Sazhin;O. Rybdylova;A. Pannala;S. Somavarapu;S. Zaripov
中科院分区：
文献类型：
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作者：
S. Sazhin;O. Rybdylova;A. Pannala;S. Somavarapu;S. Zaripov
提出了一种新的液滴干燥模型。该模型基于球形液滴内部传热方程和物质扩散方程的解析解。分散在周围蒸发液体中的小固体颗粒，或溶解在该液体中的非蒸发物质，被视为非蒸发组分。在新模型中，液滴干燥过程涉及三个关键的子过程：液滴加热/冷却、液滴内组分的扩散和挥发性组分的蒸发。用该模型对壳聚糖水溶液喷雾的干燥过程进行了分析。蒸发过程结束后，模型预测的残余固球尺寸与实验观测值基本一致。
A new model for droplet drying is suggested. This model is based on the analytical solutions to the heat transfer and species diffusion equations inside spherical droplets. Small solid particles dispersed in an ambient evaporating liquid, or a non-evaporating substance dissolved in this liquid, are treated as non-evaporating components. Three key sub-processes are involved in the process of droplet drying within the new model: droplet heating/cooling, diffusion of the components inside the droplets, and evaporation of the volatile component. The model is used to analyse the drying of a spray consisting of chitosan dissolved in water. After completion of the evaporation process, the size of the residual solid ball predicted by the model is consistent with those observed experimentally.