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Batmunkh, Munkhbayar,Tanshen, Md. R.,Nine, Md. J.,Myekhlai, Munkhshur,Choi, Heekyu,Chung, Hanshik,Jeong, Hyomin American Chemical Society 2014 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH - Vol.53 No.20
<P>Nanofluid is a colloidal suspension which has received great attention over the past two decades, but its limited heat transfer enhancement is a matter of concern for industrial applications. We demonstrate an improvement in the thermal conductivity of TiO<SUB>2</SUB> nanofluids with an addition of negligible amounts of modified silver “Ag” nanoparticles. In this work, the surface/shape of newly synthesized “Ag” nanoparticles is modified by planetary ball milling. Then, to enhance the thermal conductivity of TiO<SUB>2</SUB> nanofluids, the flattened “Ag” particles are incorporated with the combination of small (15 nm) and large (300 nm) TiO<SUB>2</SUB> nanoparticles in an aqueous solution. The thermal conductivities of Ag/TiO<SUB>2</SUB>–water nanofluids with various weight concentrations are measured at temperatures ranging from 15 to 40 °C. As a result, the present study confirms that the thermal conductivity of TiO<SUB>2</SUB> based solution can be improved by introducing the flattened “Ag” particles.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/iecred/2014/iecred.2014.53.issue-20/ie403712f/production/images/medium/ie-2013-03712f_0006.gif'></P>