Double sublimation fronts model within cylindrical porous media with cylindrical dielectric cores in microwave freeze drying

Hongwei Wu, Zhi Tao, Guohua Chen, Hongwu Deng, Guoqiang Xu, Shuiting Ding

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)


A mathematical model of double sublimation fronts was developed for microwave freeze-drying for a cylindrical porous media with cylindrical dielectric cores. The set of transient governing equations describing the drying process were solved numerically with the variable time-step finite volume method. The numerical results show that two sublimation fronts do exist within the porous media. Proper usage of cylindrical dielectric cores can dramatically reduce the drying time. The impact of cylindrical dielectric cores on drying can not be ignored even though the initial saturation was low (S0=0.2).
Original languageEnglish
Pages (from-to)869-875
Number of pages7
JournalHuagong Xuebao/Journal of Chemical Industry and Engineering (China)
Issue number6
Publication statusPublished - 1 Jun 2004
Externally publishedYes


  • Cylindrical dielectric core
  • Double sublimation fronts
  • Freeze-drying
  • Microwave heating
  • Porous media

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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