Abstract

A new model for droplet drying is suggested. This model is based on theanalytical solutions to the heat transfer and species di usion equations insidespherical droplets. Small solid particles dispersed in an ambient evaporatingliquid, or a non-evaporating substance dissolved in this liquid, are treatedas non-evaporating components. Three key sub-processes are involved in theprocess of droplet drying within the new model: droplet heating/cooling, diffusionof the components inside the droplets, and evaporation of the volatilecomponent. The model is used to analyse the drying of a spray consistingof chitosan dissolved in water. After completion of the evaporation process,the size of the residual solid ball predicted by the model is consistent withthose observed experimentally.
Original languageEnglish
Pages (from-to)451-458
Number of pages8
JournalInternational Journal of Heat and Mass Transfer
Volume122
DOIs
Publication statusPublished - 8 Feb 2018

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Bibliographical note

© 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

  • Droplets
  • heating
  • evaporation
  • drying
  • chitosan
  • water

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