Journal
AICHE JOURNAL
Volume 64, Issue 7, Pages 2770-2780Publisher
WILEY
DOI: 10.1002/aic.16088
Keywords
LBM; multirelaxation-time; longitudinal mass dispersion; random placement; porous media
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Funding
- 111 Project [D17005]
- National Natural Science Foundation of China [91534106, 21506032]
- Distinguished Young Researcher Training Project in Universities of Fujian Province [83016023]
- Fuzhou University Qishan Scholar (Overseas Project) [XRC-1458]
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To research macroscopic mass transport characteristics of porous media, a lattice Boltzmann method (LBM) approach was utilized to calculate asymptotic longitudinal mass dispersion. In this study, a D2Q9 model with multi-relaxation-time (MRT) collision operator, which is appropriate for incompressible flow with a high Peclet number without refining the lattice, was chosen. With respect to the microstructure of porous media, random placement (RP) method was applied to obtain randomly positioned particles. Based on the exhausted numerical results presented in the study, a new correlation of longitudinal mass dispersion was established. By comparing with available experimental data in the literature, reasonable agreements are observed in a wide porosity range from 0.3 to 0.7, indicating the validity of the proposed correlation. (c) 2018 American Institute of Chemical Engineers AIChE J, 64: 2770-2780, 2018
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