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Naslov:Soot effected sample entropy minimization in nanofluid for thermal system design : a thermal lens study
Avtorji:ID Swapna, Mohanachandran Nair Sindhu (Avtor)
ID Raj, Vimal (Avtor)
ID Satheesh Kumar, K. (Avtor)
ID Iyer Sankararaman, Sankaranarayana (Avtor)
Datoteke: Gradivo nima datotek, ki so prostodostopne za javnost. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Neznano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:The present work suggests a method of improving the thermal system efficiency, through entropy minimisation, and unveils the mechanism involved by analysing the molecular/particle dynamics in soot nanofluids (SNFs) using the time series, power spectrum, and wavelet analyses of the thermal lens signal (TLS). The photothermal energy deposition in the SNF lowers the refractive index due to the temperature rise. It triggers the particle dynamics that are investigated by segmenting the TLS and analysing the refractive index, phase portrait, fractal dimension (D), Hurst exponent (H), and sample entropy (SampEn). The wavelet analysis gives information about the relation between the entropy and the frequency components. When the phase portrait analysis reflects the complex dynamics from region 1 to 2 for all the samples, the SampEn analysis supports it. The decreasing value of D (from 1.59 of the base fluid to 1.55 and 1.52) and the SampEn (from 1.11 of the base fluid to 0.385 and 0.699) with the incorporation of diesel and camphor soot, indicate its ability to lower the complexity, randomness, and entropy. The increase of SampEn with photothermal energy deposition suggests its relation to the thermodynamic entropy (S). The lowering of thermal diffusivity value of the base fluid from 1.4 × 10−7 m2/s to 1.1 × 10−7 and 0.5 × 10−7 m2 /s upon diesel and camphor soot incorporation suggests the heat-trapping and reduced molecular dynamics in heat dissipation.
Ključne besede:soot, entropy, thermal system, photothermal, time series, nanofluid, fractal
Leto izida:2020
Št. strani:str. 1-8
Številčenje:Vol. 318, 11
PID:20.500.12556/RUNG-7401 Novo okno
COBISS.SI-ID:113289219 Novo okno
UDK:53
ISSN pri članku:0167-7322
DOI:10.1016/j.molliq.2020.114038  Novo okno
NUK URN:URN:SI:UNG:REP:F5HLKQF5
Datum objave v RUNG:30.06.2022
Število ogledov:2524
Število prenosov:0
Metapodatki:XML DC-XML DC-RDF
:
SWAPNA, Mohanachandran Nair Sindhu, RAJ, Vimal, SATHEESH KUMAR, K. in IYER SANKARARAMAN, Sankaranarayana, 2020, Soot effected sample entropy minimization in nanofluid for thermal system design : a thermal lens study. Journal of molecular liquids [na spletu]. 2020. Vol. 318, no. 11, p. 1–8. [Dostopano 8 april 2025]. DOI 10.1016/j.molliq.2020.114038 . Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=7401
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Gradivo je del revije

Naslov:Journal of molecular liquids
Skrajšan naslov:J. mol. liq.
Založnik:Elsevier
ISSN:0167-7322
COBISS.SI-ID:15382277 Novo okno

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