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Title: Comparative study of droplet drying models for CFD modelling
Authors: Woo, M.W.
Daud, W.R.W.
Mujumdar, A.S. 
Talib, M.Z.M.
Hua, W.Z.
Tasirin, S.M.
Keywords: CFD sub-model
Single droplet drying
Spray drying
Issue Date: Sep-2008
Citation: Woo, M.W., Daud, W.R.W., Mujumdar, A.S., Talib, M.Z.M., Hua, W.Z., Tasirin, S.M. (2008-09). Comparative study of droplet drying models for CFD modelling. Chemical Engineering Research and Design 86 (9) : 1038-1048. ScholarBank@NUS Repository.
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. © 2008 The Institution of Chemical Engineers.
Source Title: Chemical Engineering Research and Design
ISSN: 02638762
DOI: 10.1016/j.cherd.2008.04.003
Appears in Collections:Staff Publications

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