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Nanoscience and Technology: An International Journal
ESCI SJR: 1.031 SNIP: 1.517 CiteScore™: 0.7

ISSN Print: 2572-4258
ISSN Online: 2572-4266

Nanoscience and Technology: An International Journal

Formerly Known as Nanomechanics Science and Technology: An International Journal

DOI: 10.1615/NanomechanicsSciTechnolIntJ.v1.i2.40
pages 169-186

BEHAVIOR OF FLUID IN PLANE NANOCHANNELS WITH DIFFERENT BOUNDARY WALLS

A. K. Abramyan
Institute of Problems of Mechanical Engineering, Russian Academy of Sciences, St. Petersburg, Russia
L. V. Mirantsev
Institute of Problems of Mechanical Engineering, Russian Academy of Sciences, St. Petersburg, Russia

ABSTRACT

The article presents the study of an equilibrium structure of fluid and the Couette shear flow in a plane nanochannel with solid crystal walls whose atoms are in the nodes of the face-centered cubic lattice. The study is conducted by molecular dynamics simulation. The following cases are considered: 1) the both walls have the same lattices with a period coinciding with the characteristic radius σ of the model Lennard–Jones interaction between the fluid particles; 2) the both walls have a face-centered cubic structure with a period half as much as the characteristic radius of interparticle interaction in fluid; 3) a period of the face-centered cubic lattice of one of the nanochannel walls coincides with σ whereas that of the other wall is less by half. The profiles of fluid density in the equilibrium state, the profiles of fluid flow velocity, and the forces acting on solid boundary walls in the Couette shear flow are calculated for the three cases mentioned. It is shown that the structure of motionless fluid in a nanochannel as well as the obtained flow velocity profiles and the forces acting on the walls strongly depend on the structure of the both boundary walls and on the distance between them.


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