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Effect of Surface Forces on the Gas Flow in Nanosized Capillaries

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Abstract

The flow of temperature-inhomogeneous gas in ultrathin capillary is considered with allowance for the action of surface forces. It is shown that the presence of surface forces considerably increases the effect of thermal transpiration compared to the classical value determined in a free molecular regime of gas flow. The coefficient responsible for the mechanocaloric effect for the case of the gas flow under the pressure gradient was also determined using Onsager relations for the kinetic coefficients calculated with account of the effect of surface forces.

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Authors and Affiliations

  1. Russian Academy of Sciences, Institute of Physical Chemistry, Leninskii pr. 31, Moscow, 119991, Russia

    V. I. Roldughin

  2. Moscow Institute of Engineering Physics, Kashirskoe sh. 31, Moscow, 115409, Russia

    V. M. Zhdanov

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  1. V. I. Roldughin
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  2. V. M. Zhdanov
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Roldughin, V.I., Zhdanov, V.M. Effect of Surface Forces on the Gas Flow in Nanosized Capillaries. Colloid Journal 65, 598–601 (2003). https://doi.org/10.1023/A:1026179924714

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