Backward-facing step heat transfer of the turbulent regime for functionalized graphene nanoplatelets based water-ethylene glycol nanofluids
Herein, an experimental study on thermo-physical properties of ethylene glycol-functionalized graphene nanoplatelets/water-ethylene glycol nanofluids (EGGNP-WEG) and a numerical study on the convective heat transfer over a backward-facing step are performed. Accordingly, EGGNP was first synthesized...
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| Main Authors: | , , , , |
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| Format: | Article |
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Elsevier
2016
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/18288/ https://doi.org/10.1016/j.ijheatmasstransfer.2016.02.042 |
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| Summary: | Herein, an experimental study on thermo-physical properties of ethylene glycol-functionalized graphene nanoplatelets/water-ethylene glycol nanofluids (EGGNP-WEG) and a numerical study on the convective heat transfer over a backward-facing step are performed. Accordingly, EGGNP was first synthesized covalently to achieve a stable colloidal solution in water-ethylene glycol mixture. Some characterizations were applied to analyze the surface functionality and morphology of EGGNP-flakes. To study the convective heat transfer coefficient in turbulent regime, a numerical study is performed at different weight fractions of EGGNP. According to the results, a higher weight concentration of EGGNP in basefluid indicates a greater extent of convective heat transfer coefficient and thermal conductivity, implying higher heat transfer rate over a backward-facing step. |
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