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多孔介质的孔隙特性对气体扩散过程影响的直接数值模拟 被引量:12

Numerical simulation for influence of pore characteristics on gas diffusion in porous media
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摘要 引言多孔介质内的扩散过程广泛存在于化工、能源、环境和生物等领域,例如石油天然气开采、污水处理、填充床化学反应、催化剂和生物组织内的质量传递等,使得多孔介质内传质现象的研究尤为重要[1-2]。多孔介质由于结构和形状各异,难以有准确、有效且简单的描述方法。 Micro-structure of porous medium that approximates natural porous medium is generated stochastically by numerical method.Numerical simulation of gas diffusion in porous media is implemented with LTRT lattice Boltzmann method to investigate the effects of pore characteristics on diffusion process.It is demonstrated that diffusion processes are quite different in different porous micro-structures with the same porosity.The results also show that the dimension of the width of channels influences the diffusion.The diffusion rates increase as the channel width increases.The effect resulted from the variation of channel width and porosity in the diffusion process is far less than that for different pore structures.The influence caused by the variation of radii of filleted corners is little.These explorations provide theoretical basis and statistical support for the generation of porous media and the design and optimization of the pore characteristics of micro-reactor.
出处 《化工学报》 EI CAS CSCD 北大核心 2013年第4期1242-1248,共7页 CIESC Journal
基金 国家自然科学基金项目(20976177 20990224 21276256) 国家杰出青年科学基金项目(21025627) 国家重点基础研究发展计划项目(2009CB623406)~~
关键词 多孔介质 微结构 扩散 格子BOLTZMANN方法 porous media micro-structure diffusion lattice Boltzmann method
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参考文献20

  • 1Jahanshahi Javaran E, Gandjalikhan Nassab S A, Jafari S. Thermal analysis of a 2-D heat recovery system using porous media including lattice Boltzmann simulation of fluid flow [J]. Int. J. Therm. Sci. , 2010, 49 (6): 1031-1041.
  • 2Yoshida H, Nagauka M. Multiple-relaxation-time lattice Boltzmann model for the convection and anisotropic diffusion equation [J]. J. Comput. Phys., 2010, 229 ( 20): 7774-7795.
  • 3郁伯铭.多孔介质输运性质的分形分析研究进展[J].力学进展,2003,33(3):333-346. 被引量:81
  • 4Hilfer R. Review on scale dependent characterization of the microstructure of porous media [ J]. Transport Porous Med. , 2002, 46 (2/3): 373-390.
  • 5Chen S, Doolen G D. Lattice Boltzmann method for fluid flows [J]. Annu. Rev. Fluid. Mech., 1998, 30 (1): 329-364.
  • 6张婷,郭照立,柴振华,施保昌.钙基吸收剂吸收CO_2过程的格子Boltzmann模拟[J].化工学报,2012,63(S1):165-171. 被引量:6
  • 7王关晴,罗丹,丁宁,黄雪峰,徐江荣.稀薄燃气多孔介质燃烧二维火焰数值模拟(英文)[J].化工学报,2012,63(6):1893-1901. 被引量:3
  • 8Nie X, Doolen G D, Chen S. Lattice-Boltzmann simulations of fluid flows in MEMS [J]. J. Stat. Phys., 2002, 107 (1/2): a67-383.
  • 9Kang Q J, Lichtner P C, Janecky C R. Lattice Boltzmann method ~or reacting flow in porous media [J]. Adv. Appl. Mech. , 2010, 2 (5): 545-563.
  • 10Succi S, Foti E, Higuera F. Three-dimensional flows in complex geometries with the lattice Boltzmann method [J]. Europhys. Lett., 1989, 10 (5): 433-438.

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