کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
204949 461093 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A theoretical study on the permeability of tight media; effects of slippage and condensation
ترجمه فارسی عنوان
یک مطالعه نظری بر نفوذ پذیری رسانه های تنگ اثرات لغزش و تراکم
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• The gas permeability is presented by combinations of dusty gas model and gas kinetic theory.
• The gas permeability is studied from macro-scale to nano-scale.
• Effects of pore size, grain surface roughness on the gas permeability are studied.
• Presented approach helps to study the influence of condensed phase on gas permeability.
• The effective gas permeability is well predicted by presented approach.

Slippage and phase change are important factors which are affected on the permeability of gas in tight media. When dealing with micro/nano-scale media, conventional equations breaks down and can not be used to characterize gas transport in tight media. In this paper, we study gas transport in tight porous media to explore effects of the condensation and different types of gas molecule surface scattering on the permeability. Using the kinetic theory of gases and with an analogy between heat transfer and mass transfer, we derive first a formula for the effective mass diffusion coefficient in tight porous media. In particular, effects of the pore size, condensed phase saturation and grain surface roughness are determined. Then, the introduced model for the effective mass diffusion coefficient is implement to the dusty gas method to make it applicable for our investigation purposes. The well-known Kozeny–Carman equations and the fractal techniques are used to predict the absolute permeability of tight porous media. Our predictions for both self-diffusivity coefficient and the permeability are in good agreement with experimental data and numerical simulations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 181, 1 October 2016, Pages 610–617
نویسندگان
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