Thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids
This paper focused on thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids at three different temperatures (6C, 25C and 40C). For the preparation of nanofluids, a two-step method, comprised of homogenisation and sonication, was used on a mixture of MWCNT-OH,...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Universiti Malaysia Pahang, Malaysia
2016
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| Subjects: | |
| Online Access: | http://eprints.utem.edu.my/id/eprint/19947/1/Thermal%20conductivity%20and%20viscosity%20of%20deionised%20water%20and%20ethylene%20glycol-based%20nanofluids.pdf http://eprints.utem.edu.my/id/eprint/19947/ |
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| Summary: | This paper focused on thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids at three different temperatures (6C, 25C and 40C). For the preparation of nanofluids, a two-step method, comprised of homogenisation and sonication, was used on a mixture of MWCNT-OH, PVP and the base fluid. The results revealed that thermal conductivity was enhanced by about 8.86% for 0.8 wt% deionised water-based MWCNT-OH nanofluid, and by 5.37% for 0.2 wt% ethylene glycol-based MWCNT-OH nanofluid. Meanwhile, in viscosity test, the highest temperature of 40C exhibited lowest viscosity. This phenomenon happened only with ethylene glycol-based nanofluid, whilst the data on the viscosity of deionised water-based nanofluid was inconsistent at certain nanofluid concentrations . In conclusion, addition of MWCNT-OH into base fluid enhanced base fluid performance , giving it the potential to be used in cooling system applications.
Keywords: Nanofluids; thermal conductivity; viscosity. |
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