Viscosity and rheological behavior of aqueous nanofluids containing TiO2 nanoparticles

Autor:	Jun Zheng, Yong Yang, Linghui Kong, Guixun Li
Rok vydání:	2020
Předmět:	Viscosity Materials science Nanofluid Aqueous solution Chemical engineering Rheology Tio2 nanoparticles
Zdroj:	IOP Conference Series: Materials Science and Engineering. 772:012031
ISSN:	1757-899X 1757-8981
DOI:	10.1088/1757-899x/772/1/012031
Popis:	Nanofluids containing different concentration of TiO2 nanoparticles were prepared. Their rheological behavior was investigated on LVDV III ultra-programmable Brookfield viscometer at different temperature and particles loading. Results show that rheological behavior of nanofluids is determinated by the concentration of TiO2 in base fluid, nanofluids shows good Newton behavior when nanoparticles loading is low, while shear thinning becomes evident when the volume fraction of particles was continuously increased. Besides, viscosity of nanofluids shows strong nanoparticles loading and temperature dependence, but quite differs from classical viscosity model, as the theory models severely underestimate the value of viscosity, which is attributed to electroviscous effect of nanoparticles in base fluids. The primary electroviscous coefficient is evaluated at different pH values. Modified primary electroviscous coefficient is in good agreement with Booth’s theory.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6f00e3f75aad15d480297f47b23eb834 https://doi.org/10.1088/1757-899x/772/1/012031 Zobrazit plný text záznamu