Год издания: 2018
Идентификатор DOI: 10.1007/978-3-319-75523-6_6
Аннотация: The viscosity and thermal conductivity of the fluid are determined by the transport of the impulse and energy in the system considered. In turn, these transports are defined by and depend on the interaction of the fluid molecules. The situation in the fluid under confined conditions (e.g., in a nanochannel) is more complicated, because the transport of the impulse and energy in fluids is highly dependent on the interaction of the fluid molecules with the wall atoms (or molecules). Therefore, the viscosity and thermal conductivity of such a fluid are the properties of the entire “fluid+wall” system. In this chapter, the statistical theory of transport processes in fluids under confined conditions is proposed. The considered system is the specific two-fluid system consisting of fluid and wall molecules. In the chapter, the new constitutive relations for the fluid under confined conditions are proposed. As a result, the Green-Kubo formulas were generalized. Using this new formula and the molecular dynamics method, the viscosity coefficient of the fluid in a nanochannel was studied. It is shown that the viscosity coefficient depends, to a large extent, on the properties of interaction of fluid molecules with channel wall atoms. © 2018, Springer International Publishing AG, part of Springer Nature.
Журнал: Fluid Mechanics and its Applications
Выпуск журнала: Vol. 118
Номера страниц: 217-236
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