Investigation of alumina nanofluid stability by UV–vis spectrum

Sadeghi, Rohollah; Etemad, S.Gh.; Keshavarzi, Ezat; Haghshenasfard, Masoud

doi:10.1007/s10404-014-1491-y

Cited by 127 publications

(53 citation statements)

References 40 publications

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“… observed 30 d stability of GNP nanofluids via periodic reflective index measurements. The colloidal stability of Al 2 O 3 ‐water nanofluids were evaluated through the extinction of UV spectra . Stability of aqueous SiO 2 and Al 2 O 3 nanofluids were investigated using spectrophotometer .…”

Section: Stability Of Nanofluidsmentioning

confidence: 99%

“…Sadeghi et al. investigated the stability of Al 2 O 3 ‐water nanofluids by determining the nanocluster size at different concentrations as a function of sonication time (Fig. ).…”

Section: Stability Of Nanofluidsmentioning

confidence: 99%

“…Fedele et al [180] measured the stability of water-based TiO 2 , CuO, and CNT nanofluids with the DLS method. Sadeghi et al [172] investigated the stability of Al 2 O 3water nanofluids by determining the nanocluster size at different concentrations as a function of sonication time ( Fig. 10).…”

Section: Light Scattering and Electron Microscopymentioning

confidence: 99%

See 2 more Smart Citations

Stability of Heat Transfer Nanofluids – A Review

2018

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Nanofluids are suspension of highly conductive nano‐sized particles in conventional fluids that may be applicable as ultrafast cooling agent to extend the thermal performance of cooling devices. However, before considering the feasibility as coolant for high heat flux components, a thorough investigation of the long‐term stability of nanofluids is of paramount importance. Preparation of extremely stable nanofluids has become one of the main technical challenges. The present contribution aims to summarize the recent developments in the preparation, characterization, and stabilization of nanofluids based on the information available in literatures. Lastly, existing needs and attainable solution to challenges, leading to the upcoming research in the development of highly stable nanofluids, are discussed.

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Section: Stability Of Nanofluidsmentioning

confidence: 99%

“…Sadeghi et al. investigated the stability of Al 2 O 3 ‐water nanofluids by determining the nanocluster size at different concentrations as a function of sonication time (Fig. ).…”

Section: Stability Of Nanofluidsmentioning

confidence: 99%

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Stability of Heat Transfer Nanofluids – A Review

2018

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“…Belirli zamanlarda yapılan spektral ölçümler nanoakışkan içerisinde topaklanmaların oluşumu hakkında bilgi vermektedir [67]. Spektral analiz nanoakışkanların kararlılığını belirlemek için literatürde sıkça kullanılmaktadır [33,[67][68][69][70][71].…”

Section: Nanoakişkanlarin Kararliliğini Artirma Yöntemleri̇unclassified

Nanoakişkanlarda Kararliliğin Isi Transferi̇ni̇ İyi̇leşti̇rme Açisindan Önemi̇

Şahin

Namli²

2018

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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Son yıllarda ısı transferini iyileştirme çalışmalarının nano boyutlardaki parçacıkların etkisi ile oluşturulan nanoakışkanlar üzerinde yoğunlaştığı görülmektedir. Nanoakışkanların ısı transferini artırdığını gösteren birçok çalışma bulunmasına rağmen geleneksel ısı transfer akışkanlarının yerini almasının önünde birçok engel bulunmaktadır. Bunlardan en önemlisi nanoakışkanlarda kararlılık konusudur. Bu konuda yapılan çalışmalar arasındaki çelişkiler, nanoakışkanlara bakış açısının değiştirilmesi gerektiği sonucunu ortaya koymaktadır. Nanoakışkanlar ısı transferini artırmanın yanında yüksek kararlılığa sahip olmalıdır. Sonuç olarak, nanoakışkanın ısı transferini iyileştirme oranının, kararlılık sağlandıktan sonra ölçülmesinin gerekliliği fikri ortaya çıkmaktadır. Bu araştırmada nanoakışkanlarda kararlılık konusunda yapılan çalışmalar detaylı bir şekilde incelenerek ısı transferi üzerindeki etkileri araştırılmıştır.

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“…Thereforeit is important measure stability of nano fluid for quality issue also. Various stabilization methods such as ultra-sonication, pH control, and adding surfactant had been considered to enhance stability during preparation of nanofluids (4). Previously, the methods to inspect stability were limited to sedimentation, photo capturing, TEM (transmission electron microscopy), SEM (scanning electron microscopy), from 2003, a new method for stability measurement by UV-Vis Spectrophotometer is adopted (5).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Stability of Water-Based Nano Fluids Using UV/VIS Spectrophotometer

Kumar¹

2017

IJRASET

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Stability is a key issue while preparing and utilization of nano fluids. Stable suspension by direct dispersion of nano particles in base fluids is not possible. Modifiers such as magnetic stirring, ultra sonication, pH modifiers and surfactant addition are used to increase the stability. But these pH modifiers and surfactant addition affect properties whereas magnetic stirring, ultra sonication involved in time consumption. There is a need to find the best method to get stable suspension with less effect on properties. The present study involves the measurement of stability in terms of absorbance by using UV/Vis spectroscopy. From this study best modifier is identified and analyzed to get better results.

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Investigation of alumina nanofluid stability by UV–vis spectrum

Cited by 127 publications

References 40 publications

Stability of Heat Transfer Nanofluids – A Review

Stability of Heat Transfer Nanofluids – A Review

Nanoakişkanlarda Kararliliğin Isi Transferi̇ni̇ İyi̇leşti̇rme Açisindan Önemi̇

Evaluation of Stability of Water-Based Nano Fluids Using UV/VIS Spectrophotometer

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