期刊
NANOSCALE RESEARCH LETTERS
卷 6, 期 -, 页码 -出版社
SPRINGEROPEN
DOI: 10.1186/1556-276X-6-560
关键词
nanofluid; rheology; hematite; ferrofluids; storage modulus; loss modulus; nanoparticles; shear thinning
资金
- Univ. de Vigo, Xunta de Galicia, Spain [PGIDIT07PXIB314181PR]
- Min. de Educacion y Ciencia, Spain [CTQ2006-15537-C02/PPQ]
- Min. de Ciencia e Innovacion, Spain
The rheological behaviour of ethylene glycol-based nanofluids containing hexagonal scalenohedral-shaped alpha-Fe2O3 (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 G', loss modulus G '' and damping factor were determined as a function of the frequency showing viscoelastic behaviour for all samples.
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