Molecular dynamics study of nanofluids viscosity with carbon tubes
https://doi.org/10.17586/2220-8054-2024-15-1-37-45
Abstract
The purpose of this paper is molecular dynamics simulation of viscosity of benzene-based nanofluids with carbon nanotubes, and carbon or copper nanoparticles. The nanotubes diameter and lengths were 1.1 nm and 1.1, 3.5, 7.2, 14.6 nm, respectively. The size of spherical nanoparticle was 1.39, 2.5, and 3.2 nm. The viscosity is calculated using the fluctuation-dissipation theorem (the Green–Kubo formula). It was shown that the viscosity coefficient of all the studied nanofluids with carbon nanotubes increases with their concentration and length. This increase is significantly higher than predicted by the corresponding theories for coarse dispersed fluids. At given weight concentrations, the viscosity coefficient of nanofluids with carbon nanotubes is higher than that of nanofluids with spherical particles. The increase in viscosity of nanofluids compared to that of the base fluid is explained by the structuring of the base fluid molecules in the vicinity of nanoparticles or carbon nanotubes.
Supporting agencies: This research was financially supported by the Russian Science Foundation (Agreement No. 20-19-00043). The authors thank A. A. Belkin and T. A. Rafalskaya for the multiple discussions of the results obtained
About the Authors
V. Ya. Rudyak
Novosibirsk State University of Architecture and Civil Engineering
Russian Federation
Russian Federation
Valery Ya. Rudyak
Novosibirsk
S. L. Krasnolutskii
Novosibirsk State University of Architecture and Civil Engineering
Russian Federation
Russian Federation
Sergey L. Krasnolutskii
Novosibirsk
E. V. Lezhnev
Novosibirsk State University of Architecture and Civil Engineering
Russian Federation
Russian Federation
Evgeniy V. Lezhnev
Novosibirsk
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For citations:
Rudyak V.Ya., Krasnolutskii S.L., Lezhnev E.V. Molecular dynamics study of nanofluids viscosity with carbon tubes. Nanosystems: Physics, Chemistry, Mathematics. 2024;15(1):37-45. https://doi.org/10.17586/2220-8054-2024-15-1-37-45
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