The influence of ash content on thermophysical properties of ethylene glycol based graphite/diamonds mixture nanofluids

Since the second half of the twentieth century, nanofluids are very promising engineering materials that can find numerous applications in the processes of heat exchange. Scientist and engineers are developing new and more advanced nanosuspensions which may differ from their physical properties, pro...

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Bibliographic Details
Published in:Diamond and related materials 2017-04, Vol.74, p.81-89
Main Authors: Żyła, Gaweł, Fal, Jacek, Estellé, Patrice
Format: Article
Language:English
Subjects:
Ash content
Ashes
Diamonds
Electrical conductivity
Electrical resistivity
Engineering Sciences
Ethylene glycol
Fluid mechanics
Graphite
Heat conductivity
Heat exchange
Heat transfer
Industrial engineering
Manufacturing engineering
Materials
Mechanics
Micro and nanotechnologies
Microelectronics
Nanodiamonds
Nanofluid
Nanofluids
Nanomaterials
Nanoparticles
Physical properties
Physics
Production costs
Rheological properties
Rheology
Thermal conductivity
Thermics
Thermophysical properties
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Summary:Since the second half of the twentieth century, nanofluids are very promising engineering materials that can find numerous applications in the processes of heat exchange. Scientist and engineers are developing new and more advanced nanosuspensions which may differ from their physical properties, production costs and practical use. The aim of this paper is to study the differences between two nanofluids containing a mixture of graphite and nanodiamonds with various ash content. Here, ethylene glycol was used as a base fluid. Rheological properties, thermal and electrical conductivities at a constant temperature 298.15K were investigated for nanoparticle volume content ranging from 0.004 to 0.023. It was presented that ash content in nanofluids changes significantly rheological properties of nanofluids containing graphite/nanodiamonds mixture nanoparticles. While the variation in ash content does not affect thermal conductivity of nanofluids, a big impact on electrical conductivity is reported. [Display omitted] •Thermophysical properties of ethylene glycol based graphite/diamonds mixture nanofluids were investigated.•Ash content changes significantly rheological properties of nanofluids containing graphite/nanodiamonds mixture nanoparticles.•Ash content does not affect thermal conductivity, but has a big impact on electrical conductivity of nanofluids.
ISSN:0925-9635
1879-0062
DOI:10.1016/j.diamond.2017.02.008