STUDY OF EFFECTIVE VISCOSITY OF NANOFLUIDS OR NANOFLUID MIXTURES

Abstract

 Although many nanofluid viscosity correlations have been developed earlier, there is no generally accepted correlation. In this paper the we small review theoretical, numerical and experimental viscosity correlations and will try to propose a new correlation based on an analysis of experimental as well as theoretical data available for nanofluids in the temperature range 273-373 K and particle diameters 2-300 nm. The proposed correlation for nanofluids will predict the effective viscosity of nanofluids based on regression analysis of theoretical and experimental viscosity results. Determination of viscosity of a nanofluid affects dimensions and dynamic parameters significantly such as the Reynolds Number, the Prandtl number, the Brinkman number and the Rayleigh number which are used for numerical analysis of thermal and fluid dynamics research. We may arrive at the result that the accurate statistics on the effective viscosity of nanofluids are essential for industrial nanofluid applications. The effective viscosity gets influenced by the viscosity of the base fluid and several parameters. The enhanced thermal characteristics of nanofluids have made it one of the fastest-growing research areas in the last decade. The parameters affecting the viscosity of nanofluids such as nano particle, volume fraction, size, shape, temperature, PH and shearing rate will be reviewed in this article.