Nanoparticle Polarization Effect on the Permittivity of the Dielectric Liquid

Baruah, Niharika; Maharana, Mrutyunjay; Dey, Sujita Srichandana; Nayak, Sisir Kumar

doi:10.1109/icdl.2019.8796533

Cited by 3 publications

(1 citation statement)

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“…The nanoparticles attract charges on their surface when an external field is applied, creating a similar behavior as that of polar molecules and resulting in the orientational polarization. In addition, the effective polarizability of the nanofluid is aided by the inner polarization of nanoparticles, resulting in an increase in the permittivity [24]. Table IV also reveals a temperaturedependent rise in the loss tangent, which could be attributed to larger relaxation loss at higher temperatures.…”

Section: Dielectric Response Spectroscopymentioning

confidence: 92%

Impact of Surfactants on the Electrical and Rheological Aspects of Silica Based Synthetic Ester Nanofluids

et al. 2022

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This study reports experimental investigations of the effects of different surfactants (CTAB, Oleic acid and Span 80) on silica based synthetic ester nanofluids. The positive and negative potential observed for the ionic (CTAB) and non-ionic surfactant (Span 80) from zeta potential analysis indicates an improved stability. The optimization of nanofillers and surfactants is performed considering the corona inception voltage measured using ultra high frequency (UHF) technique and fluorescent fiber. Rheological analysis shows no significant variation of properties with shear rate, implying Newtonian behavior even with the addition of surfactant. In addition, the permittivity of the nanofluid is not much affected by adding surfactant but a marginal variation is noticed in the loss tangent with the effect of temperature. The fluorescence spectroscopy shows no change in the emission wavelength with the addition of silica nanofiller and surfactants. Flow electrification studies indicate an increase in the streaming current with the rotation speed and temperature, with a higher current magnitude observed in the case of nanofluids.

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Section: Dielectric Response Spectroscopymentioning

confidence: 92%