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International Heat Transfer Conference 15

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

An Improved Capillary Bundle Model by Using Tortuosity and Parameters Extracted from Pore Network Model

Xinhuan Zhou
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, Liaoning 116024, China

Lanlan Jiang
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116024, China; Research Institute of Innovative Technology for the Earth, Kizugawa City, Kyoto 619-0292, Japan

Lingyu Chen
Dalian University of Technology

Yu Liu
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, Liaoning 116024, China

Yongchen Song
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, No.2 Linggong Rd. Ganjingzi District, Liaoning 116024, China

Meiheriayi Mutailipu
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, Liaoning 116024, China

DOI: 10.1615/IHTC15.pmd.009841
pages 6643-6649


KEY WORDS: Porous media, Computational methods, micro-CT, pore network model, capillary bundle model

Abstract

Pore-scale modelling is an important new tool which can supplement special core analysis measurements by providing two phase and multiphase flow functions for a range of rock and pore types. In the present work, a new computational method that is a modified capillary bundle model estimates the permeability of porous media. Initially, the micro-CT imaging is used to obtain 3D image of sand packed bed. From the image, the topological and geometrical properties of the pore space of those packed bed is obtained by analyzing the extracted pore network model. Then a random walker method is applied to calculate the three-dimensional pore tortuosity. Finally, a capillary bundle model is modified using parameters of pore space obtained from the aforementioned two steps. Absolute permeability of the sand packed beds are calculated using the improved method presented compare using the semi-empirical Kozeny–Carman (KC) equation and other previously proposed methods in this paper. The numerical results agree better with the experimental data than other methods which indicates that our modified method succeeded in raising the accuracy of existing models.

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