Effects of thermal boundary conditions on the performance of spray dryers

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Sara Moradi Maryamnegari
  • Ali Ashrafizadeh
  • Egbert Baake
  • Mattia Guglielmi

External Research Organisations

  • K.N. Toosi University of Technology
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Details

Original languageEnglish
Article number111250
JournalJournal of food engineering
Volume338
Early online date20 Aug 2022
Publication statusPublished - Feb 2023

Abstract

In this paper, three kinds of wall conditions are numerically simulated to investigate deposition, powder recovery and energy aspects of spray dryers. A co-current dryer with a pressure nozzle is chosen as a base dryer and two dryers with fully insulated, and cooled walls are compared with the base one. Governing equations of a transient flow field are solved through the Eulerian approach, while Lagrangian particle tracking predicts particles’ motion. The sticky point curve is employed as a criterion of bouncing or stickiness to model the deposition pattern of skim milk particles on the surfaces. Results show that the spray dryer with cooled walls has better deposition characteristics, while the dryer with insulated surfaces works with higher drying efficiency. Overall, it is observed that the wall conditions can be changed to improve the drying efficiency and wall deposition. However, changing the thermal boundary conditions does not seem to be effective in improving the powder recovery.

Keywords

    CFD simulation, Deposition, Energy performance, Skim milk, Spray drying, Sticky point curve

ASJC Scopus subject areas

Cite this

Effects of thermal boundary conditions on the performance of spray dryers. / Moradi Maryamnegari, Sara; Ashrafizadeh, Ali; Baake, Egbert et al.
In: Journal of food engineering, Vol. 338, 111250, 02.2023.

Research output: Contribution to journalArticleResearchpeer review

Moradi Maryamnegari S, Ashrafizadeh A, Baake E, Guglielmi M. Effects of thermal boundary conditions on the performance of spray dryers. Journal of food engineering. 2023 Feb;338:111250. Epub 2022 Aug 20. doi: 10.1016/j.jfoodeng.2022.111250
Moradi Maryamnegari, Sara ; Ashrafizadeh, Ali ; Baake, Egbert et al. / Effects of thermal boundary conditions on the performance of spray dryers. In: Journal of food engineering. 2023 ; Vol. 338.
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