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Nanoscience and Technology: An International Journal
ESCI SJR: 0.219 SNIP: 0.484 CiteScore™: 0.37

ISSN Imprimir: 2572-4258
ISSN En Línea: 2572-4266

Nanoscience and Technology: An International Journal

Formerly Known as Nanomechanics Science and Technology: An International Journal

DOI: 10.1615/NanomechanicsSciTechnolIntJ.v1.i1.30
pages 49-97

GAS FLOW AND DIFFUSION IN NANO-SIZED CAPILLARIES AND POROUS BODIES

V. M. Zhdanov
Moscow Institute of Engineering Physics, 31 Kashirskoe Highway 115409 Moscow, Russia
Vjacheslav Roldughin
A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31 Leninskii Ave., 119991, Moscow, Russia

SINOPSIS

Kinetic effects related to flows of gases and gas mixtures in capillaries and porous bodies are discussed. The models of porous media and the methods for calculation of kinetic coefficients are described. Much attention has been paid to the dusty-gas model. Results of calculation of the kinetic coefficients for small and large values of the Knudsen number are presented with due account for incomplete accommodation of molecules on the surfaces of capillary walls. Special features of gas flows in ultra-fine channels and the effects related to the action of surface forces, surface diffusion, entrainment of gases by phonons and quasi-one-dimensionality of gas flows have been considered. The effects of the asymmetry of gas transport through multilayer membranes have been discussed.


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