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HomeMaterials Science ForumMaterials Science Forum Vol. 757Stability of Nanofluids

Stability of Nanofluids

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Abstract:

It has long been established that a suspension of nanosized solid particles in liquids provide useful advantages in industrial heat transfer fluid systems. Numerous investigations on nanofluids show a significant enhancement in thermal conductivity over the base fluid in which these nanoparticles are dispersed. However, the stability of the suspension is critical in the development and application of these new kind of heat transfer fluids. Rather, high discrepancy in the published data for the same nanoparticles on the physical and thermal characteristics of nanofluids is primarily due to different methods adopted by different researchers to obtain stable nanofluids. Sedimentation and agglomeration of nanoparticles in nanofluids and their dispersion stability has not been well addressed in the literature. Hence, there is a need to establish a standard method of preparation of these nanofluids so as to obtain a unified data which can eventually be utilized for the application of nanofluids. This chapter focuses on the stability of nanofluids prepared via two step process. Different parameters that affect the stability of nanofluids have been discussed. Different techniques that have been used for the evaluation of the stability characteristics of nanofluids have been elucidated.

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Periodical:

Materials Science Forum (Volume 757)

Pages:

139-149

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.757.139

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Online since:

May 2013

Authors:

Hema Setia, Ritu Gupta, R.K. Wanchoo

Keywords:

Dynamic Light Scattering, Mixing, Nanofluid, Nanoparticle, pH, Shear, Sonication, Surfactant, Zeta Potential

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