Research output: Contribution to journal › Article › peer-review
Comparative characteristics of viscosity and rheology of nanofluids with multi-walled and single-walled carbon nanotubes. / Rudyak, Valery Ya; Dashapilov, Gennady R.; Minakov, Andrey V. et al.
In: Diamond and Related Materials, Vol. 132, 109616, 02.2023.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Comparative characteristics of viscosity and rheology of nanofluids with multi-walled and single-walled carbon nanotubes
AU - Rudyak, Valery Ya
AU - Dashapilov, Gennady R.
AU - Minakov, Andrey V.
AU - Pryazhnikov, Maxim I.
N1 - This paper was supported by the Russian Science Foundation (Grant No. 20-19-00043 ).
PY - 2023/2
Y1 - 2023/2
N2 - The purpose of this paper is to study the viscosity and rheology of nanofluids with single-walled (SWCNT) and multi-walled (MWCNT) carbon nanotubes, and compare the obtained data. In total, a series of different nanofluids have been studied. The same base fluids were used in all experiments; the range of weight concentrations of carbon nanotubes (CNTs) and surfactants (if used) was also the same. In total, about two dozen of different nanofluids have been studied. The weight concentrations of CNTs ranged from 0.05 to 1 %. It is shown that with the same weight concentration of CNTs, nanofluids with SWCNTs have a significantly higher viscosity than nanofluids with MWCNTs. In most cases, the studied nanofluids were pseudo- or viscoplastic, although all the base fluids were Newtonian. Correlations describing the rheology of all studied nanofluids are given. It is shown that the viscosity of the nanofluids increases with a decrease in the average hydrodynamic size of nanotubes. The microrheology of these nanofluids has been studied and the dependence of their elastic modulus on the concentration of CNTs has been determined.
AB - The purpose of this paper is to study the viscosity and rheology of nanofluids with single-walled (SWCNT) and multi-walled (MWCNT) carbon nanotubes, and compare the obtained data. In total, a series of different nanofluids have been studied. The same base fluids were used in all experiments; the range of weight concentrations of carbon nanotubes (CNTs) and surfactants (if used) was also the same. In total, about two dozen of different nanofluids have been studied. The weight concentrations of CNTs ranged from 0.05 to 1 %. It is shown that with the same weight concentration of CNTs, nanofluids with SWCNTs have a significantly higher viscosity than nanofluids with MWCNTs. In most cases, the studied nanofluids were pseudo- or viscoplastic, although all the base fluids were Newtonian. Correlations describing the rheology of all studied nanofluids are given. It is shown that the viscosity of the nanofluids increases with a decrease in the average hydrodynamic size of nanotubes. The microrheology of these nanofluids has been studied and the dependence of their elastic modulus on the concentration of CNTs has been determined.
KW - Carbon nanotubes
KW - Microrheology
KW - Nanofluids
KW - Rheology
KW - Viscosity
UR - https://www.scopus.com/inward/record.url?eid=2-s2.0-85144579900&partnerID=40&md5=6bed710039275b7068473daed3c15a84
UR - https://www.mendeley.com/catalogue/855e3014-f2a7-3a53-b296-c0e64574c34c/
U2 - 10.1016/j.diamond.2022.109616
DO - 10.1016/j.diamond.2022.109616
M3 - Article
VL - 132
JO - Diamond and Related Materials
JF - Diamond and Related Materials
SN - 0925-9635
M1 - 109616
ER -
ID: 49728680