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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 624145, 8 pages
http://dx.doi.org/10.1155/2014/624145
Research Article

Pore Network Analysis of Zone Model for Porous Media Drying

1School of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi’an, Shaanxi 710021, China
2State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China

Received 24 February 2014; Accepted 18 April 2014; Published 18 May 2014

Academic Editor: Zhijun Zhang

Copyright © 2014 Yuan Yuejin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In view of the fact that the zone model for porous media drying cannot disclose the mechanism of liquid phase distribution effectively, a pore network model for the slow isothermal drying process of porous media was developed by applying the theories of pore network drying and transport-process, which fused the physical parameters of porous media, such as porosity, pore mean diameter, and pore size distribution into the model parameters, and a sand bed drying experiment was conducted to verify the validity of this model. The experiment and simulation results indicate that the pore network model could explain the slow isothermal drying process of porous media well. The pore size distributions of porous media have a great effect on the liquid phase distribution of the drying process. The dual-zone model is suitable for the porous media whose pore size distribution obeys Gaussian distribution, while the three-zone model is suitable for the porous media whose pore size distribution obeys the lognormal distribution when the drying analysis of porous media is conducted.