Rheological and volumetric properties of TiO2-ethylene glycol nanofluids

Abstract

Homogeneous stable suspensions obtained by dispersing dry TiO2 nanoparticles in pure ethylene glycol were prepared and studied. Two types of nanocrystalline structure were analyzed, namely anatase and rutile phases, which have been characterized by scanning electron microscopy. The rheological behavior was determined for both nanofluids at nanoparticle mass concentrations up to 25%, including flow curves and frequency-dependent storage and loss moduli, using a cone-plate rotational rheometer. The effect of temperature over these flow curve tests at the highest concentration was also analyzed from 283.15 to 323.15 K. Furthermore, the influence of temperature, pressure, nanocrystalline structure, and concentration on the volumetric properties, including densities and isobaric thermal expansivities, were also analyzed.

Magnetorheological behaviour of propylene glycol-based hematite nanofluids

“…There are many studies in literature about the rheological behaviour of nanofluids (Bouhamed et al 2013;Cabaleiro et al 2013a;Chen et al 2007;Chen 2009;Mariano et al 2013;Nguyen et al 2007), and this includes a large number based on magnetorheological behaviour of nanofluids (De Vicente et al 2011a;Felicia and Philip 2014;Katiyar et al 2012;Mertelj et al 2013). However, it is important to go further in the study of the rheological behaviour of nanofluids through the precise characterization of physical parameters like particle type, shape, size, dispersion stability, concentration or applied magnetic field, and this is the main motivation of the present work.…”

Electrical Properties of Aluminum Oxide-Ethylene Glycol (Al₂O₃-EG) Nanofluids

“…The largest application area for nanouids is believed to be in the transfer of heat and stability, miniaturized systems with microchannel cooling without cogging and reduction in pumping power [1]. The main areas of research nanosuspensions focus on their mechanical properties [2,3], thermal conductivity [4,5], and electrical conductivity.…”

Effect of Temperature and Mass Concentration of SiO2Nanoparticles on Electrical Conductivity of Ethylene Glycol

“…Since this time nanofluids are object of interests of many researchers, especially in rheological, thermal, and electrical properties. The rheological properties of ethylene glycol based nanofluids with various types of nanoparticles were investigated both in experimental and theoretical fields [2][3][4][5]. Also thermal conductivity of various types of nanofluids based on ethylene glycol was widely studied [6][7][8].…”