An analytical model for gas transport through elliptical nanopores
作者： Zheng Sun , Juntai Shi , Keliu Wu , Tao Zhang , Dong Feng
DOI: 10.1016/J.CES.2019.01.013
关键词: Materials science 、 Slip flow 、 Knudsen diffusion 、 Continuum (measurement) 、 Mechanics 、 Large pore 、 Pore scale 、 Superposition principle 、 Nanopore
摘要: Abstract Effect of pore geometry on nanoconfined gas transport capacity has not been clearly revealed. Elliptical cross-section can vary from circular to slit-like shape by adjusting the aspect ratio (AR), which covers a wide range shapes and shares more research value over that regular cross-section. In this paper, novel analytical model for in elliptical nanopores is established based weighted superposition continuum flow Knudsen diffusion, possesses solidified theoretical background than existed models nanopores. Results show contribution diffusion will increase with AR at certain scale. For pressure point, mechanism within large scale be greater small The discrepancy simplifying as circle about 90% flow, 50% slip 10% transition well diffusion. proposed advance current understanding characteristics through realistic shale matrix.
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