Rheological non-Newtonian behaviour of ethylene glycol-based Fe<sub>2</sub>O<sub>3 </sub>nanofluids
<p>Abstract</p> <p>The rheological behaviour of ethylene glycol-based nanofluids containing hexagonal scalenohedral-shaped <it>α</it>-Fe<sub>2</sub>O<sub>3 </sub>(hematite) nanoparticles at 303.15 K and particle weight concentrations up...
Main Authors: | , , , |
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Format: | Article |
Language: | English |
Published: |
SpringerOpen
2011-01-01
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Series: | Nanoscale Research Letters |
Subjects: | |
Online Access: | http://www.nanoscalereslett.com/content/6/1/560 |
Summary: | <p>Abstract</p> <p>The rheological behaviour of ethylene glycol-based nanofluids containing hexagonal scalenohedral-shaped <it>α</it>-Fe<sub>2</sub>O<sub>3 </sub>(hematite) nanoparticles at 303.15 K and particle weight concentrations up to 25% has been carried out using a cone-plate Physica MCR rheometer. The tests performed show that the studied nanofluids present non-Newtonian shear-thinning behaviour. In addition, the viscosity at a given shear rate is time dependent, i.e. the fluid is thixotropic. Finally, using strain sweep and frequency sweep tests, the storage modulus <it>G</it>', loss modulus <it>G</it>″ and damping factor were determined as a function of the frequency showing viscoelastic behaviour for all samples.</p> |
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ISSN: | 1931-7573 1556-276X |