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>&#945;</it>-Fe<sub>2</sub>O<sub>3 </sub>(hematite) nanoparticles at 303.15 K and particle weight concentrations up...

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Bibliographic Details
Main Authors: Pastoriza-Gallego Mar&#237;a, Lugo Luis, Legido Jos&#233;, Pi&#241;eiro Manuel
Format: Article
Language:English
Published: SpringerOpen 2011-01-01
Series:Nanoscale Research Letters
Subjects:
Online Access:http://www.nanoscalereslett.com/content/6/1/560
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Summary:<p>Abstract</p> <p>The rheological behaviour of ethylene glycol-based nanofluids containing hexagonal scalenohedral-shaped <it>&#945;</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>&#8243; and damping factor were determined as a function of the frequency showing viscoelastic behaviour for all samples.</p>
ISSN:1931-7573
1556-276X