Thermal conductivity and viscosity measurements of ethylene glycol-based Al<sub>2</sub>O<sub>3 </sub>nanofluids
<p>Abstract</p> <p>The dispersion and stability of nanofluids obtained by dispersing Al<sub>2</sub>O<sub>3 </sub>nanoparticles in ethylene glycol have been analyzed at several concentrations up to 25% in mass fraction. The thermal conductivity and viscosity...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2011-01-01
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| Series: | Nanoscale Research Letters |
| Online Access: | http://www.nanoscalereslett.com/content/6/1/221 |
| _version_ | 1797715913538011136 |
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| author | Pastoriza-Gallego María Lugo Luis Legido José Piñeiro Manuel |
| author_facet | Pastoriza-Gallego María Lugo Luis Legido José Piñeiro Manuel |
| author_sort | Pastoriza-Gallego María |
| collection | DOAJ |
| description | <p>Abstract</p> <p>The dispersion and stability of nanofluids obtained by dispersing Al<sub>2</sub>O<sub>3 </sub>nanoparticles in ethylene glycol have been analyzed at several concentrations up to 25% in mass fraction. The thermal conductivity and viscosity were experimentally determined at temperatures ranging from 283.15 K to 323.15 K using an apparatus based on the hot-wire method and a rotational viscometer, respectively. It has been found that both thermal conductivity and viscosity increase with the concentration of nanoparticles, whereas when the temperature increases the viscosity diminishes and the thermal conductivity rises. Measured enhancements on thermal conductivity (up to 19%) compare well with literature values when available. New viscosity experimental data yield values more than twice larger than the base fluid. The influence of particle size on viscosity has been also studied, finding large differences that must be taken into account for any practical application. These experimental results were compared with some theoretical models, as those of Maxwell-Hamilton and Crosser for thermal conductivity and Krieger and Dougherty for viscosity.</p> |
| first_indexed | 2024-03-12T08:13:51Z |
| format | Article |
| id | doaj.art-649ab24945f541edbb2fd11da7cf5a7a |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T08:13:51Z |
| publishDate | 2011-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-649ab24945f541edbb2fd11da7cf5a7a2023-09-02T19:00:25ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2011-01-0161221Thermal conductivity and viscosity measurements of ethylene glycol-based Al<sub>2</sub>O<sub>3 </sub>nanofluidsPastoriza-Gallego MaríaLugo LuisLegido JoséPiñeiro Manuel<p>Abstract</p> <p>The dispersion and stability of nanofluids obtained by dispersing Al<sub>2</sub>O<sub>3 </sub>nanoparticles in ethylene glycol have been analyzed at several concentrations up to 25% in mass fraction. The thermal conductivity and viscosity were experimentally determined at temperatures ranging from 283.15 K to 323.15 K using an apparatus based on the hot-wire method and a rotational viscometer, respectively. It has been found that both thermal conductivity and viscosity increase with the concentration of nanoparticles, whereas when the temperature increases the viscosity diminishes and the thermal conductivity rises. Measured enhancements on thermal conductivity (up to 19%) compare well with literature values when available. New viscosity experimental data yield values more than twice larger than the base fluid. The influence of particle size on viscosity has been also studied, finding large differences that must be taken into account for any practical application. These experimental results were compared with some theoretical models, as those of Maxwell-Hamilton and Crosser for thermal conductivity and Krieger and Dougherty for viscosity.</p>http://www.nanoscalereslett.com/content/6/1/221 |
| spellingShingle | Pastoriza-Gallego María Lugo Luis Legido José Piñeiro Manuel Thermal conductivity and viscosity measurements of ethylene glycol-based Al<sub>2</sub>O<sub>3 </sub>nanofluids Nanoscale Research Letters |
| title | Thermal conductivity and viscosity measurements of ethylene glycol-based Al<sub>2</sub>O<sub>3 </sub>nanofluids |
| title_full | Thermal conductivity and viscosity measurements of ethylene glycol-based Al<sub>2</sub>O<sub>3 </sub>nanofluids |
| title_fullStr | Thermal conductivity and viscosity measurements of ethylene glycol-based Al<sub>2</sub>O<sub>3 </sub>nanofluids |
| title_full_unstemmed | Thermal conductivity and viscosity measurements of ethylene glycol-based Al<sub>2</sub>O<sub>3 </sub>nanofluids |
| title_short | Thermal conductivity and viscosity measurements of ethylene glycol-based Al<sub>2</sub>O<sub>3 </sub>nanofluids |
| title_sort | thermal conductivity and viscosity measurements of ethylene glycol based al sub 2 sub o sub 3 sub nanofluids |
| url | http://www.nanoscalereslett.com/content/6/1/221 |
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