Impact of viscosity of nanofluid and ionic liquid on heat transfer

Soman, Divya P.; Karthika, S.; Kalaichelvi, P.; Radhakrishnan, T. K.

doi:10.1016/j.molliq.2019.111349

Cited by 24 publications

(8 citation statements)

References 29 publications

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“…In the studies carried out by the researchers on this subject, while the greatest weight was on thermal conductivity, [18][19][20][21] studies on viscosity, which is another important thermophysical property,. 22,23 While there is a lot of research in the literature on determining the important thermophysical properties of nanofluids such as thermal conductivity and viscosity, studies on specific heat are extremely limited. 24,25 Esfe et al 26 conducted an experimental study on the thermal conductivity changes in the 30 C to 50 C temperature range of nanofluids obtained by adding ZnO and MWCNT nanoparticles to water and ethylene glycol base fluids.…”

Section: Enginementioning

confidence: 99%

“…For this reason, studies on nanofluids in the literature have focused on determining the thermophysical properties of nanofluids. In the studies carried out by the researchers on this subject, while the greatest weight was on thermal conductivity, 18‐21 studies on viscosity, which is another important thermophysical property, 22,23 . While there is a lot of research in the literature on determining the important thermophysical properties of nanofluids such as thermal conductivity and viscosity, studies on specific heat are extremely limited 24,25 …”

Section: Introductionmentioning

confidence: 99%

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Experimental study for thermal conductivity of water‐based zirconium oxide nanofluid: Developing optimal artificial neural network and proposing new correlation

Çolak

2020

Int J Energy Res

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Summary In this study, five different water based ZrO2 nanofluids were prepared at volumetric concentrations of 0.0125%, 0.025%, 0.05%, 0.1%, and 0.2%. In the preparation of nanofluids, two‐step method was preferred, magnetic stirrer and ultrasonic homogenizer were used. Their thermal conductivity was measured experimentally in the temperature range of 10°C to 65°C. Using the obtained experimental data, a multi‐layer perceptron feed‐forward back‐propagation artificial neural network was developed. In addition, a new correlation was proposed for the calculation of the thermal conductivity values of the ZrO2/Water nanofluid. The results showed that the ZrO2/Water nanofluid had higher thermal conductivity compared to the base fluid and the thermal conductivity increases with the increase in temperature and concentration. While the artificial neural network developed with experimental data predicted the thermal conductivity of ZrO2/Water nanofluid with an average error of −0.41%, the new correlation developed predicted it with an average error of −0.02%. These values were an indication that the results obtained from the developed artificial neural network and the correlation are in perfect agreement with the experimental data.

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Section: Enginementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental study for thermal conductivity of water‐based zirconium oxide nanofluid: Developing optimal artificial neural network and proposing new correlation

Çolak

2020

Int J Energy Res

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“…Ionic liquids have recently received considerable attention for their wide range of applications, which are inevitably possible due to the attractive chemical and physical properties of these chemicals (Amarasekara and Owereh, 2011). The ionic liquids are mainly used as catalysts, solvents, electrolytes, biosensors, heat transfer fluids, reaction media, thermal stabilizers and polymeric plasticizers (Chernikova et al, 2015;Hamidova et al, 2015;Sathyabhama and Hegde, 2006;Soman et al, 2016). Ionic liquids are entirely composed of organic cations with different alkyl substituents or functional groups and inorganic anions.…”

Section: Introductionmentioning

confidence: 99%

“…Ionic liquids are entirely composed of organic cations with different alkyl substituents or functional groups and inorganic anions. They are organic salts with a boiling point below 100 0 C (Ghandi, 2014;Hamidova et al, 2015;Soman et al, 2016). The thermophysical properties of the ionic liquids are entirely dependent on the ions with which they are composed (Ghandi, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…This can be obtained by adjusting the chemical structure of the constituent ions. Some of the exceptional properties of ionic liquids are low vapor pressure, remarkable catalytic properties, high ionic conductivity, high thermal stability, nonflammability and excellent solubility with organic and inorganic compounds (Santos et al, 2015;Soman et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Thermal Conductivity Enhancement of Aqueous Ionic Liquid and Nanoparticle Suspension

Soman

Kalaichelvi

Radhakrishnan

2019

Braz. J. Chem. Eng.

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In the present study, the thermal conductivities of ionic liquid + water in the concentrations 0.1-0.6 %w/w and temperatures (302.5-337.9 K) are determined. The thermal conductivity of aqueous 1-butyl-3-methylimidazolium bromide declined with increasing concentration and temperature. A quadratic model is developed for predicting the thermal conductivity of aqueous ionic liquid using response surface methodology with R 2 = 0.99. A two-layered feed forward back propagation neural network 2-10-1 is also modeled with mean square error, root means square and absolute average error percentage of 0.005, 0.071 and 2.684, respectively. The thermal conductivity of nanofluid (γ-Al 2 O 3 /water) is estimated and compared with the ionic liquid solution at the same concentration and temperature range. Thermal conductivity enhancement ratios of aqueous ionic liquids are found to be more than nanoparticle suspensions.

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Novel and Efficient Knoevenagel Condensation over Mesoporous SBA‐15 Supported Acetate‐functionalized Basic Ionic Liquid Catalyst

Chen

2020

ChemistrySelect

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A type of multifunctional mesoporous SBA‐15 supported imidazolium ionic liquids SBA‐15@IL‐OAc have been designed and synthesized, characterized and tested as heterogeneous catalysts in the Knoevenagel condensation. The prepared catalysts exhibit good catalytic performances in the reaction at room temperature, especially the supported ionic liquid SBA‐15@IL‐OAc(0.8) with excellent yields of 90∼98 %, probably due to the synergetic effect between acetate anion sites of imidazolium ionic liquid and hydroxyl active sites of SBA‐15. In addition, the recyclability of the heterogeneous catalyst was tested, and the cycle test showed that the catalyst could be reused five times without significantly reducing the catalytic activity.

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Impact of viscosity of nanofluid and ionic liquid on heat transfer

Cited by 24 publications

References 29 publications

Experimental study for thermal conductivity of water‐based zirconium oxide nanofluid: Developing optimal artificial neural network and proposing new correlation

Experimental study for thermal conductivity of water‐based zirconium oxide nanofluid: Developing optimal artificial neural network and proposing new correlation

Thermal Conductivity Enhancement of Aqueous Ionic Liquid and Nanoparticle Suspension

Novel and Efficient Knoevenagel Condensation over Mesoporous SBA‐15 Supported Acetate‐functionalized Basic Ionic Liquid Catalyst

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