Heat and Mass Transfer Model for Droplets with Internal Circulation

Mathias Poulsen, Kim Sørensen, Thomas Condra

Research output: Contribution to journalConference article in JournalResearchpeer-review

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Abstract

In large droplets the internal resistance to heat or mass transfer has to be accounted for. Two respective models for low and high Reynolds numbers are investigated. The models are solved numerically for a range of modified Peclet numbers and the corresponding transfer numbers, representing either the Nusselt or Sherwood numbers, are determined. The results for each model are fitted to produce an expression that can be easily evaluated for use in a CFD code. The fits has mean deviations of 0.63% and 0.035% for the low and high Reynolds number models respectively. A proposed switching Reynolds number is used to combine the models and the combined model is compared to temperature measurements of free falling water droplets. It was found that the model is in good agreement with the data for the smallest droplets whereas it deviates as much as 40% for the larger droplets in the data set
Original languageEnglish
JournalProceedings of The 61st SIMS Conference on Simulation and Modelling SIMS 2020
Volume176
Issue number27
Pages (from-to)195-202
Number of pages8
DOIs
Publication statusPublished - Mar 2021
Event61st SIMS Conference on Simulation and Modelling SIMS 2020 - , Finland
Duration: 22 Sep 202024 Sep 2020

Conference

Conference61st SIMS Conference on Simulation and Modelling SIMS 2020
Country/TerritoryFinland
Period22/09/202024/09/2020

Keywords

  • internal circulation
  • Mass transfer
  • Heat transfer
  • Droplet
  • CFD

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