Viscosity studies on novel copper oxide–coconut oil nanofluid

Rashin, M. Nabeel; Hemalatha, J.

doi:10.1016/j.expthermflusci.2013.02.009

Cited by 86 publications

(11 citation statements)

References 18 publications

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“…6 represents the dependence of viscosity enhancement ratio on temperature for differ nanoparticles concentrations. As can be seen, deterioration of viscosity with temperature obvious, which is in accordance with earlier works 2,21 . Noticeably, viscosity of nanofluids relatively higher than that measured for the base fluid.…”

Section: Boiling Thermal Performancesupporting

confidence: 79%

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Thermal Performance and Viscosity of Biologically Produced Silver/Coconut Oil Nanofluids

Sarafraz¹

2017

Chem.Biochem.Eng.Q.

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In this work, thermal conductivity, viscosity, and boiling heat transfer coefficient of a biologically produced nano-coolant were experimentally quantified. The nanoparticles were produced from silver nitrate via the plant extraction method and by means of green tea leaf extract. The mean size of the particles was 50 nm, with spherical morphology and single-phase structure of Ag (silver). The synthesized particles were dispersed in coconut oil as base fluid. Thermal conductivity and viscosity of the nanofluid were experimentally measured and correlated based on temperature and concentration of nanoparticles via the regression analysis. Thermal performance of the nanofluid inside an annular heat exchanger with convective boiling conditions (in forced convection and nucleate boiling heat transfer regimes) was assessed. The results demonstrated a superior thermal performance in both heat transfer regions over the base oil, and revealed that this nanofluid can be used as a coolant as well as a lubricant in engines with high heat flux conditions, as its thermal conductivity and viscosity were enhanced due to the presence of Ag particles inside the oil.

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Section: Boiling Thermal Performancesupporting

confidence: 79%

“…Hemalatha et al 21 ZnO-coconut oil vol. % = 0-2.5 %, Ultrasonically Two-step method was employed to prepare the nanofluids, experimental viscosity was measured and correlation was proposed.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance and Viscosity of Biologically Produced Silver/Coconut Oil Nanofluids

Sarafraz¹

2017

Chem.Biochem.Eng.Q.

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“…The and Brinkman equations for a CuO nanoparticles dispersed in the mixture of glycol and water [22]. Similar work was done by Nabeel and Hemalatha (2013) for a nanofluid ZnO dispersed in coconut oil [10]. Amin and Farzad (2019), have studied the viscosities of ZnO and MgO in oil predicted the viscosities using above models.…”

Section: Viscosity and Density Measurementmentioning

confidence: 84%

“…To determine Brownian velocity (VB) of the particle, the diffusion time D  related to temperature could be calculated using equation [10]: Table 5 illustrates the fitting of variation of density with temperature in same non-linear empirical equations (used to predict viscosity) and observed that again the second order quadratic logarithmic equation was highly correlated with good R 2 > 0.999 value. This equation could be used to predict density of nanofluid in the experiential volume fraction and temperature.…”

Section: Viscosity and Density Measurementmentioning

confidence: 99%

Thermo-physcial Properties and Characterization of TiO2 based Nanofluid Blended with Moringa Oleifera Oil

Amsavahini

Janani

et al. 2021

Preprint

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Nanoparticle TiO2 was synthesized by the co-precipitate method and was dispersed in palm oil blended with Moringa oleifera seed oil (Enriched palm oil-EPO). Structural and compositional analysis of TiO2 nanoparticles was carried out using SEM (Scanning Electron Microscope), XRD (X-Ray Diffraction) and FTIR analysis (Fourier Transform Infrared Spectroscopy). Using the analytical method, particle dimension, crystallite size by Debye Scherrer’s equation and vibrational energy of the molecule was investigated. Palm oil was blended with synthesised Moring oil to enhance its oxidative stability. TiO2 nanoparticles were dispersed at different volume fraction in EPO to analyse the temperature dependent physical properties. Bio-degradable lubricant nature of TiO2 based nanofluid was investigated by the variation of viscosity and density with temperature (30 to 60˚C). The amphiphilic properties of fatty acids in blended oils can contribute better lubrication compared to mineral oils. Experimented viscosity and density values with temperature was fitted to a non-linear equations, and was pragmatic that quadratic equation exhibits a best fit R2 > 0.999. Theoretical value of the viscosity was predicted using Einstein, Batchelor, and Wang mathematical model and was compared with the experimental value. Brownian motion of the particle in the oil was studied through the diffusion constant, diffusion time, and Brownian velocity. The present study could be used to synthesis nanofluid with desired volume fraction, viscosities and densities, so as work as a suitable bio degradable lubricant in many industrial applications.

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“…Rashin és Hemalatha [17] ZnO és kókuszolaj nanofluid viszkozitását vizsgálták különböző hőmérsékleten és különböző koncentrációban. A folyadék 0-2,5%-os tartományban nemnewtoni viselkedést mutatott.…”

Section: Bevezetésunclassified

CNT adalékolt kenőanyag viszkozitásának vizsgálata

Gergely

Szonja

Gabriella

et al. 2019

MDT

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Célunk olyan két komponensből álló kenőanyag vizsgálata, melyben a nanoméretű CNT szemcsék egyenletesen szétoszlatva (diszpergálva) vannak jelen a glicerin alapfolyadékban. A cikkben glicerin és szén nanocsövek különböző arányú keverékének viszkozitását elemezzük a hőmérséklettől és a fordulatszámtól függően. Megállapítottuk, hogy a glicerin nyírófeszültsége egyenesen arányos a deformációsebességgel. Ha a kenőanyag 1 m% CNT-t tartalmaz, akkor pszeudoplasztikus jelleget mutat; a nyírófeszültség-nyírási sebesség hatványtörvényszerinti összefüggésében a kitevő a hőmérséklet növelésével csökken.

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Viscosity studies on novel copper oxide–coconut oil nanofluid

Cited by 86 publications

References 18 publications

Thermal Performance and Viscosity of Biologically Produced Silver/Coconut Oil Nanofluids

Thermal Performance and Viscosity of Biologically Produced Silver/Coconut Oil Nanofluids

Thermo-physcial Properties and Characterization of TiO2 based Nanofluid Blended with Moringa Oleifera Oil

CNT adalékolt kenőanyag viszkozitásának vizsgálata

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