RT Journal Article
T1 Thermal and rheological behaviour of stearate-based phase change nanofluids
A1 Iglesias Prado, José Ignacio
A1 Navarro, María Elena
A1 Calviño Barreiro, Uxía
A1 Ding, Yulong
A1 Lugo Latas, Luis
K1 2204 Física de Fluidos
AB A comprehensive study has been performed on the thermal and rheological behaviour of two sets of isooctyl stearate (PureTemp 8, PT8) based nanofluids with different concentrations of spherical MgO nanoparticles (up to 15 wt%) and graphene nanoplatelets (up to 2 wt%). The results show that the presence of the nanomaterials does not significantly alter the phase change temperatures of the base fluids, although the latent heat decreases by 27% and 7.6% for 15 wt% MgO and 1.0 wt% GnP-based nanofluids, respectively. Both nanomaterials are found to increase the thermal diffusivity of the nanofluids. GnP-based suspensions have a higher thermal diffusivity than the MgO ones at similar nanomaterial concentrations. Rheological analyses show that MgO-PT8 nanofluids behave as a viscoplastic material (solid at zero shear rate); whereas the GnP-PT8 samples are viscoelastic (liquid at zero shear rate). MgO nanoparticles promote the formation of large fractal agglomerates, leading to a strong gel network of particles within PT8, while platelet-shaped GnP gives a fluid-like behaviour.
PB Journal of Molecular Liquids
SN 01677322
YR 2023
FD 2023-09
LK http://hdl.handle.net/11093/4948
UL http://hdl.handle.net/11093/4948
LA eng
NO Journal of Molecular Liquids, 385, 122293 (2023)
NO Agencia Estatal de Investigación | Ref. ENE2017-86425-C2-1-R
DS Investigo
RD 13-oct-2024