Viscosity affected by nanoparticle aggregation in Al<sub>2</sub>O<sub>3</sub>-water nanofluids
<p>Abstract</p> <p>An investigation on viscosity was conducted 2 weeks after the Al<sub>2</sub>O<sub>3</sub>-water nanofluids having dispersants were prepared at the volume concentration of 1-5%. The shear stress was observed with a non-Newtonian behavior. O...
| 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/6/1/248 |
| Summary: | <p>Abstract</p> <p>An investigation on viscosity was conducted 2 weeks after the Al<sub>2</sub>O<sub>3</sub>-water nanofluids having dispersants were prepared at the volume concentration of 1-5%. The shear stress was observed with a non-Newtonian behavior. On further ultrasonic agitation treatment, the nanofluids resumed as a Newtonian fluids. The relative viscosity increases as the volume concentrations increases. At 5% volume concentration, an increment was about 60% in the re-ultrasonication nanofluids in comparison with the base fluid. The microstructure analysis indicates that a higher nanoparticle aggregation had been observed in the nanofluids before re-ultrasonication.</p> |
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| ISSN: | 1931-7573 1556-276X |