Comparative study of droplet drying models for CFD modelling

Meng Wai Woo, Wan Ramli Wan Daud, Arun S. Mujumdar, Meor Zainal Meor Talib, Wu Zhong Hua, Siti Masrinda Tasirin

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

CFD simulation is used to study wall deposition and agglomeration phenomena commonly encountered in industrial spray dryers. This paper initially provides a comparison of two drying kinetics models: Characteristic Drying Curve (CDC) and Reaction Engineering Approach (REA). Comparisons are made with experimental data with application to carbohydrate droplet drying obtained from past workers. These models were then extrapolated to actual drying conditions to assess their performance. The REA model predicts the progressive reduction in drying rate better than the CDC model for the carbohydrate droplets. A modified CDC model incorporating a convex falling rate produced better agreement than the conventional linear falling rate model. Further analysis showed that the REA model can be extended to simulate the particle surface moisture which may affect the agglomeration process. The proposed concept was compared with reported simulation results from a diffusion model which showed reasonable fit with data.

Original languageEnglish
Pages (from-to)1038-1048
Number of pages11
JournalChemical Engineering Research and Design
Volume86
Issue number9
DOIs
Publication statusPublished - Sep 2008

Fingerprint

Drying
Computational fluid dynamics
Carbohydrates
Agglomeration
Moisture
Kinetics

Keywords

  • CFD sub-model
  • Single droplet drying
  • Spray drying

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Comparative study of droplet drying models for CFD modelling. / Woo, Meng Wai; Wan Daud, Wan Ramli; Mujumdar, Arun S.; Meor Talib, Meor Zainal; Hua, Wu Zhong; Tasirin, Siti Masrinda.

In: Chemical Engineering Research and Design, Vol. 86, No. 9, 09.2008, p. 1038-1048.

Research output: Contribution to journalArticle

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