Open AccessThe Stability and Thermal Conductivity of Cobalt Nano fluids in Base Liquid Water and Glycerol Mixture
Author(s) -
T. Rajendra Prrasad*,
K. Rama Krishna,
K. V. Sharma
Publication year - 2019
Publication title -
international journal of recent technology and engineering
Language(s) - English
Resource type - Journals
ISSN - 2277-3878
DOI - 10.35940/ijrte.c6676.098319
Subject(s) - nanofluid , zeta potential , thermal conductivity , materials science , dispersion (optics) , base (topology) , chemical engineering , cobalt , conductivity , work (physics) , glycerol , dispersion stability , nanoparticle , thermal stability , thermodynamics , analytical chemistry (journal) , chromatography , composite material , chemistry , nanotechnology , organic chemistry , metallurgy , optics , mathematical analysis , physics , mathematics , engineering
The present work involves in determination of a suitable ratio of glycerol-water (GW) mixture for the preparation of nanofluid. The base liquid with 30% weight of glycerol is selected, based on the thermo-physical properties for dispersion of spherical cobalt (Co) nanoparticles of 80nm size, for a maximum concentration of 2% by weight. The stability investigation of prepared nanofluids is done by measuring Zeta potential and SEM imaging. The prepared cobalt nanofluid thermal conductivity is measured by maintaining 7.5pH as that concerned value has maximum Zeta potential. The maximum increment in thermal conductivity is found to be 38.4% for 2% nanofluid concentration is determined at a temperature of 60oC. The data obtained for the base liquid are in fine concurrence with the published data