Experimental investigation and model development for effective viscosity of MgO–ethylene glycol nanofluids by using dimensional analysis, FCM-ANFIS and GA-PNN techniques

Adio, Saheed Adewale; Mehrabi, Mehdi; Sharifpur, Mohsen; Meyer, Josua P.

doi:10.1016/j.icheatmasstransfer.2016.01.005

Cited by 64 publications

(29 citation statements)

References 46 publications

(62 reference statements)

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“…It can be observed that the nanofluid viscosity increases with the volume concentration. Previous studies [27][28][29][30][31][32][33] reported similar results for the viscosities and thermal conductivities of nanofluids. The density and specific heat of the nanofluid were calculated using the following mixing theory equations:…”

Section: Thermophysical Properties Of Nanofluidssupporting

confidence: 72%

“…Because of the increasing demand for improvements in a heat exchanger's performance, new heat transfer transport fluids called nanofluids were introduced towards the end of the last century. The term 'nanofluid' was first introduced by Choi in 1995 [1], after which many researchers investigated (i) the preparation and thermophysical properties of nanofluids [2][3][4][5][6][7], (ii) forced convection using nanofluids in heat exchangers [8][9][10][11][12][13][14], and (iii) the natural convection of nanofluids in cavities [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of convection heat transfer in the transition flow regime of aluminium oxide-water nanofluids in a rectangular channel

Osman

Sharifpur

Meyer

2019

International Journal of Heat and Mass Transfer

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The growing demand for energy worldwide requires that attention be given to designing and operating heat exchangers and thermal devices to utilise and save thermal energy. There is a need to find new heat transport fluids with better heat transfer properties to increase convective heat transfer, and nanofluids have been shown to be good alternatives to conventional heat transport fluids. Although extensive research has been done on the properties of nanofluids in recent decades, there is still a lack of research on convection heat transfer involving nanofluids, particularly in the transitional flow regime. This study investigated the convective heat transfer of a one-step prepared alumina-water nanofluid. A uniformly heated rectangular channel was experimentally investigated. Nanofluids with volume concentrations of 0.3, 0.5, and 1% were used, and a Reynolds number range of 200-7 000 was considered, which included laminar and turbulent flows, as well as the transition regime from laminar to turbulent flow. The temperatures and pressure drops were measured to evaluate the heat transfer coefficients, Nusselt numbers, and pressure drop coefficients. The results showed enhancements of the heat transfer coefficients for the nanofluids used. The 1.0% nanofluid showed the maximum enhancements, with values of 54% in the transition flow regime and 11% in the turbulent regime. The convective heat transfer efficiency in the transition flow regime was observed to be better than those in the turbulent and laminar flow regimes.

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Section: Thermophysical Properties Of Nanofluidssupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Experimental investigation of convection heat transfer in the transition flow regime of aluminium oxide-water nanofluids in a rectangular channel

Osman

Sharifpur

Meyer

2019

International Journal of Heat and Mass Transfer

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“…The estimated standard uncertainty u r ðgÞ ¼5% and uðTÞ ¼ 0:10K Adio et al [39] proposed another model introduced specially for MgO-EG nanofluids on the basis of nonlinear regression modeling: Figure 4 presents results of ten subsequent measurements of thermal conductivity, and the average calculated based on them. These results show that MgO-EG nanofluids were stable several hours after preparation.…”

Section: Resultsmentioning

confidence: 99%

“…These properties make MgO-EG nanofluids particularly interesting from the point of view of future applications. Adio et al [39] present results of their work on experimental investigation and model development for effective viscosity of magnesium oxide-ethylene glycol nanofluids. They used dimensional analysis, FCM-ANFIS and GA-PNN techniques to prepare model of viscosity depend on temperature and volume fraction of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Viscosity and thermal conductivity of MgO–EG nanofluids

Żyła

2017

J Therm Anal Calorim

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Nanofluids are a group of novel engineering materials that are increasingly being used, particularly in the processes of heat exchange. One of the most promising materials in this group is magnesium oxide-ethylene glycol (MgO-EG) nanofluid. The literature informs that this material is characterized by an significant increase in thermal conductivity with low dynamic viscosity increase. The aim of this paper is to provide experimental data on the dynamic viscosity and thermal conductivity of nanofluids containing MgO nanoparticles with 20 nm average size and ethylene glycol as base fluid. To determine dynamic viscosity and thermal conductivity of samples, a HAAKE MARS 2 rheometer (Thermo Electron Corporation, Karlsruhe, Germany) and KD2 Pro Thermal Properties Analyzer (Decagon Devices Inc., Pullman, Washington, USA) were used. Additionally, a comparison of the experimental results and the predictions of theoretical models was presented. It was presented that the vast majority of theoretical models does not describe in a correct way both viscosity and thermal conductivity. It was also shown that the enhancement of this basic physical properties might be described with good result with second degree polynomials. Finally, evaluation of the heat transfer performance was presented.

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“…By using the methods of dimensional analysis, the experimental data have been accurately predicted. Based on the methodology employed by Adio et al [29], the nondimensional parameters for the PKF-based nanofluids are presented in equation (7). The function f in equation 7is obtained using nonlinear regression and presented in equation 8:…”

Section: Coefficientmentioning

confidence: 99%

Experimental investigations into viscosity, pH and electrical conductivity of nanofluid prepared from palm kernel fibre and a mixture of water and ethylene glycol

et al. 2018

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Extensive research has been carried out on the synthesis and applications of nanofluid produced from metals, nonmetals and their oxides. However, little or no attention has been paid to bio-based nanoparticles. The need for the use of bio-based nanoparticles and bio-based nanofluids is imperative to mitigate over-dependence on toxic synthetic nanoparticles. This idea is also in line with renewable and sustainable developmental goals. Moreover, bio-based materials like palm kernel fibre (PKF) constitute environmental waste in some quarters and its conversion to useful products for engineering application will take a long time in solving environmental issues and health hazards. In this study, the top-down approach was used to synthesize nanoparticles from PKF using a ball-milling machine. The PKF nanoparticles with an average size of ∼40 nm were dispersed in an ethylene glycol (EG)/water (50:50) base fluid up to 0.5% of the volume fraction. The viscosity, pH and electrical conductivity of PKF-water and EG (50:50) were studied for temperature ranging from 10 to 60 • C. The results showed that the viscosity of the PKF-based nanofluid increases with an increase in volume fraction and decreases exponentially with an increase in the working temperature of the nanofluid. The pH and the electrical conductivity increased as the volume fraction of the PKF nanoparticle was increased from 0.1 to 0.5%. However, the pH decreased with an increase in the temperature while the electrical conductivity increased with an increase in the volume fraction. Since the notable theoretical models in the literature were unable to estimate the viscosity of the PKF-EG/water nanofluid, in the present case an empirical correlation based on dimensional analysis was proposed to estimate the viscosity of the PKF-EG/water nanofluids.

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Experimental investigation and model development for effective viscosity of MgO–ethylene glycol nanofluids by using dimensional analysis, FCM-ANFIS and GA-PNN techniques

Cited by 64 publications

References 46 publications

Experimental investigation of convection heat transfer in the transition flow regime of aluminium oxide-water nanofluids in a rectangular channel

Experimental investigation of convection heat transfer in the transition flow regime of aluminium oxide-water nanofluids in a rectangular channel

Viscosity and thermal conductivity of MgO–EG nanofluids

Experimental investigations into viscosity, pH and electrical conductivity of nanofluid prepared from palm kernel fibre and a mixture of water and ethylene glycol

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