Multiscale Simulations of Spray Drying Process
Main Article Content
Abstract
Spray drying process for powder production is widely commercialized in diary industrial sector. In this paper, a multiscale study of spray drying process with skim milk served as drying product is presented. Firstly, a characteristic drying curve model is developed to describe the heat and mass transfer of single droplet drying process. The parameters of the characteristic drying curve model are established based on the experimental observation. Then, the single droplet drying characters are incorporated into a computational fluid dynamic (CFD) solver to customize the heat, mass and momentum transfer between the droplet/particle and the drying agent flow inside a spray dryer. The CFD simulation results are validated by comparing against the experimental data observed on a pilot-scale spray dryer. A good agreement between numerical and experimental result on both of fluid phase and particle properties indicates the predictability of the CFD simulation. The influence of the drying conditions on the drying efficiency of the tower is also explored in detail.
Keywords
spray drying, CFD simulation, single droplet drying model, characteristic drying curve model, skim milk
Article Details
References
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[2] E.H.-J. Kim, X.D. Chen, D. Pearce, Surface composition of industrial spray-dried milk powders. 1. Development of surface composition during manufacture, Journal of Food Engineering 94 (2009) 163–168.
[3] A. Gharsallaoui, G. Roudaut, O. Chambin, A. Voilley, R. Saurel, Applications of spray-drying in microencapsulation of food ingredients: An overview, Food Research International 40 (2007) 1107–1121.
[4] C.-Y. Su, H.-Z. Tang, K. Chu, C.-K. Lin, Cosmetic properties of TiO2/mica-BN composite powder prepared by spray drying, Ceramics International 40 (2014) 6903–6911.
[5] M. Nakamura, K. Kazuo, T. Arai, S. Toyoda, Multi-stage spray drying method in manufacturing heavy duty detergents, Drying Technology 4 (1986) 67–88.
[6] K. Master, Handbook of spray drying, 3rd ed., George Godwin, London, 1979.
[7] A.S. Mujumdar, Handbook of Industrial Drying, 4th ed., CRC Press Inc,
[8] E. Tsotsas, Multiscale approaches to processes that combine drying with particle formation, Drying Technology 33 (2015) 1859–1871.
[9] A.M. Goula, K.G. Adamopoulos, Spray drying of tomato pulp: Effect of feed concentration, Drying Technology 22 (2004) 2309–2330.
[10] X. Li, N. Anton, C. Arpagaus, F. Belleteix, T.F. Vandamme, Nanoparticles by spray drying using innovative new technology: the Büchi nano spray dryer B-90, Journal of controlled release official journal of the Controlled Release Society 147 (2010) 304–310.
[11] L. Alamilla-Beltrán, J.J. Chanona-Pérez, A.R. Jiménez-Aparicio, G.F. Gutiérrez-López, Description of morphological changes of particles along spray drying, Journal of Food Engineering 67 (2005) 179–184.
[12] C. Anandharamakrishnan, Computational fluid dynamics applications in food processing, Springer New York, New York, NY, 2013.
[13] R. Kuriakose, C. Anandharamakrishnan, Computational fluid dynamics (CFD) applications in spray drying of food products, Trends in Food Science & Technology 21 (2010) 383–398.
[14] I.C. Kemp, D.E. Oakley, Modelling of particulate drying in theory and practice, Drying Technology 20 (2002) 1699–1750.
[15] T.T.H. Tran, M. Jaskulski, E. Tsotsas, Reduction of a model for single droplet drying and application to CFD of skim milk spray drying, Drying Technology (2017) 1–13.
[16] S.X.Q. Lin, X.D. Chen, D.L. Pearce, Desorption isotherm of milk powders at elevated temperatures and over a wide range of relative humidity, Journal of Food Engineering 68 (2005) 257–264.
[17] T.T.H. Tran, J.G. Avila-Acevedo, E. Tsotsas, Enhanced methods for experimental investigation of single droplet drying kinetics and application to lactose/water, Drying Technology 34 (2016) 1185–1195.