Characterization of the nanoparticles, the stability analysis and the evaluation of a new hybrid nano-oil thermal conductivity

Geng, Yuancheng; Al‐Rashed, Abdullah A.A.A.; Mahmoudi, Boshra; Alsagri, Ali Sulaiman; Shahsavar, Amin; Talebizadehsardari, Pouyan

doi:10.1007/s10973-019-08434-y

Cited by 26 publications

(11 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The two-step approach is used for mass scale processing due to the ease and relatively low cost [28]. Among these two techniques, the two-step method is widely used by researchers and also industrialists [1,4,38]. Besides, by Choi and Eastman [7] particularly advises this approach for producing oxide-based nanofluids rather than nanofluids based on metallic nanoparticles.…”

Section: Preparation Methods Of Hybrid Nanofluidsmentioning

confidence: 99%

Preparation Methods and Challenges of Hybrid Nanofluids: A Review

Urmi

Shafiqah

Rahman

et al. 2020

ARFMTS

View full text Add to dashboard Cite

The recent studies on nanotechnology have reported rapid development of nanofluids in various aspects due to the enhanced thermophysical and heat transfer properties of nanofluids. This paper reviews the preparation methods and some challenging issues of hybrid nanofluids during the Preparation of hybrid nanofluids. One-step and two-step are mainly the preparation methods of hybrid nanofluids. Compared to the one-step method, the two-step method is a widely used technique for preparing nanofluids due to its simplicity, whereas this technique has a complexity of achieving stability of hybrid nanofluids. On the contrary, the one-step is very flexible for achieving uniformity of nanofluids with comparatively high production cost. Some researchers followed various techniques such as surfactant addition, surface treatment, and pH modification for preparing a durable nanofluid. However, these methods also have their limitation, such as degrading the thermal attributes of hybrid nanofluids. So, future studies need to address these challenges along with the cost analysis during preparing the hybrid nanofluids.

show abstract

Section: Preparation Methods Of Hybrid Nanofluidsmentioning

confidence: 99%

Preparation Methods and Challenges of Hybrid Nanofluids: A Review

Urmi

Shafiqah

Rahman

et al. 2020

ARFMTS

View full text Add to dashboard Cite

show abstract

“…On the contrary, the two-step method is utilised mainly in various industries for the synthesis of nanofluids [15]. Additionally, most of the researchers use this method during the preparation of nanofluids [30][31][32]. Choi and Eastman [4] especially suggested about two-step synthesis technique for oxide base nanoparticles rather than nanofluids based on metal particles.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Stability of 40% Ethylene Glycol Based TiO2-Al2O3 Hybrid Nanofluids

Urmi¹,

Rahman²,

Azmi³

et al. 2020

ARFMTS

View full text Add to dashboard Cite

This paper is presented to investigate experimentally on the stability of 40% ethylene glycol-based TiO2-Al2O3 hybrid nanofluids. Recently, the research is more highlighted on the thermophysical-properties of nanofluids. Hence, the stability of the hybrid nanofluids thoroughly assessed in this research work. The study uses the two-step method for preparing 40% ethylene glycol-based TiO2-Al2O3 hybrid nanofluids. The experiment is carried out for the various combination of mixture ratios including 20:80, 40:60, 50:50, 60:40 and 80:20 of TiO2-Al2O3 nanoparticles with a volume concentration of 0.1%. The stability assessment of hybrid nanofluids is accomplished through visualisation effect, transmission electronic microscopic observation, UV-Vis spectrophotometry and zeta potential value from particle size analyser. The findings show the optimum mixing ratios of TiO2-Al2O3 nanoparticles in terms of stability which is further confirmed by Zeta potential and absorbency from UV-Vis spectrophotometry. The results from the study reveal that 80:20 ratio of TiO2-Al2O3 nanoparticles possesses the best uniformity for over 21 days without any noticeable settlement of particles in the colloidal suspension. Moreover, 50:50 and 60:40 ratios show modest stability for almost two weeks while 20:80 and 40:60 ratios of TiO2-Al2O3 nanoparticles show minimum stability along with rapid sedimentation in the dispersion. However, it is also evident that the optimum mixing ratio of TiO2-Al2O3 hybrid nanofluids has excellent stability which will lead to further study on the thermal properties of nanofluids and finally motivate engineers to the real-life application of nanofluids.

show abstract

“…The NFs, which are obtained by adding high-conductivity nanoparticles to conventional coolants, are used by researchers who believe that low thermal conductivity of common coolants is one of the reasons for their poor cooling performance [22][23][24][25]. So far, extensive research has shown that NFs have better thermal properties than conventional heat transfer fluids [26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the cooling efficiency of magnetite–water nanofluid in a twisted tube exposed to a rotating magnetic field

Niknejadi

Afrand

Karimipour

et al. 2020

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

In this experimental research, the laminar forced convection of water-magnetite nanofluid (NF) in a horizontal twisted tube (TT) is examined under a rotating magnetic field (MF). The findings are compared with those of the plain tube (PT). The influence of nanoadditive concentration ( ), Reynolds number (Re), twist pitch (P) and MF arrangement on the heat transfer, friction factor and overall thermohydraulic features of NF is assessed. The MF consists of two magnets that rotate around the tube. For each of the magnets, three modes of clockwise rotation, counterclockwise rotation and without rotation are considered. The findings showed that the combined use of TT and rotating MF entails an increase in the overall thermohydraulic features of water-magnetite NF. In addition, it was found that the overall thermohydraulic features of NF augment with boosting , while they decline with boosting P and Re. Moreover, it was revealed that the best thermohydraulic features of the water-magnetite NF belonged to the case of = 2%, Re = 500 and P = 10 mm in the presence of a rotating magnetic field resulting from the clockwise rotation of the first magnet and the counterclockwise rotation of the second magnet.

show abstract

Characterization of the nanoparticles, the stability analysis and the evaluation of a new hybrid nano-oil thermal conductivity

Cited by 26 publications

References 40 publications

Preparation Methods and Challenges of Hybrid Nanofluids: A Review

Preparation Methods and Challenges of Hybrid Nanofluids: A Review

Experimental Investigation on the Stability of 40% Ethylene Glycol Based TiO2-Al2O3 Hybrid Nanofluids

An experimental study on the cooling efficiency of magnetite–water nanofluid in a twisted tube exposed to a rotating magnetic field

Contact Info

Product

Resources

About