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Naslov:Thermal Lensing of Multi-Walled Carbon Nanotube Solutions as Heat-Transfer Nanofluids
Avtorji:ID Swapna, Mohanachandran Nair Sindhu, UNIVERSITY OF KERALA (Avtor)
ID VIMAL, RAJ, UNIVERSITY OF KERALA (Avtor)
ID HUMBERTO, CABRERA, ICTP, ITALY (Avtor)
ID SANKARANARAYANA IYER, SANKARARAMAN, UNIVERSITY OF KERALA (Avtor)
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Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:This paper unwraps nanofluids’ particle dynamics with multi-walled carbon nanotubes (MWCNTs) in base fluids such as acetone, water, and ethylene glycol. Having confirmed the morphology and structure of the MWCNTs by field emission scanning electron microscopy, X-ray diffraction, and Raman spectroscopic analyses, the nanofluids are prepared in three different concentrations. The nonzero absorbance at the laser wavelength, revealed through the UV−visible spectrum, makes the thermal diffusivity study of the sample by the sensitive nondestructive single beam thermal lens (TL) technique possible. The TL signal analysis by time series and fractal techniques divulges the complex particle dynamics, through phase portrait, sample entropy, fractal dimension, and Hurst exponent. The study unveils the effect of the amount of nanoparticles and the viscosity of the medium on thermal diffusivity and particle dynamics. The observed inverse relation between thermal diffusivity and viscosity is in good agreement with the Sankar−Swapna model. The complexity of particle dynamics in MWCNT nanofluids reflected through sample entropy, and fractal dimension shows an inverse relation to the base fluid’s viscosity. This paper investigates the role of viscosity of the base fluid on particle dynamics and thermal diffusivity of the nanofluid to explore its applicability in various thermal systems, thereby suggesting a method to tune the sample entropy through proper selection of base fluid.
Ključne besede:MWCNT, thermal lens, fractals, nonlinear time series, phase portrait, sample entropy
Verzija publikacije:Objavljena publikacija
Leto izida:2021
Št. strani:3416-3425
Številčenje:4, 4
PID:20.500.12556/RUNG-7393 Novo okno
COBISS.SI-ID:112981763 Novo okno
DOI:10.1021/acsanm.0c03219 Novo okno
NUK URN:URN:SI:UNG:REP:GFHYUVYE
Datum objave v RUNG:28.06.2022
Število ogledov:2863
Število prenosov:0
Metapodatki:XML DC-XML DC-RDF
:
SWAPNA, Mohanachandran Nair Sindhu, VIMAL, RAJ, HUMBERTO, CABRERA in SANKARANARAYANA IYER, SANKARARAMAN, 2021, Thermal Lensing of Multi-Walled Carbon Nanotube Solutions as Heat-Transfer Nanofluids. ACS Applied Nanomaterials [na spletu]. 2021. Vol. 4, no. 4, p. 3416–3425. [Dostopano 18 april 2025]. DOI 10.1021/acsanm.0c03219. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=7393
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Gradivo je del revije

Naslov:ACS Applied Nanomaterials
Založnik:ACS
Leto izida:2021
ISSN:2574-0970

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