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    Volume 44, Issue 3 (May 2016)

    Thermal Conductivity and Viscosity of Vegetable Oil–Based Cu, Zn, and Cu–Zn Hybrid Nanofluids

    (Received 11 July 2014; accepted 22 October 2014)

    Published Online: 2014

    CODEN: JTEVAB

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    Abstract

    Sustainable manufacturing can be considered as one of the most important issues, which use the processes that play down negative environmental impacts in pursuing the bigger picture of sustainable development. An eco-friendly cutting fluid will go along with machining to achieve relative sustainability. To achieve relative sustainability level in machining, eco-friendly nanofluids are developed in this paper. Nanofluid is a stable colloidal suspension of ultrafine solid particles in a nanometric dimension dispersed in conventional and lubrication fluids. A two-step approach of synthesis of Zn, Cu, and Cu–Zn nanoparticles by mechanical alloying, followed by dispersing them in a base fluid (vegetable oil) to prepare nanofluids has been adopted. Powder particles were characterized by x-ray diffraction (XRD) and a particle-size analyzer. It is found from the XRD results that the crystallite size was around 26 nm for Cu powders, 59 nm for Zn powders, and 25 nm for Cu–Zn alloy after 60 h of milling. The particles size reduced to 60 nm for Zn, 60 nm for Cu, and 70 nm for Cu–Zn alloy after 60 h of milling. The enhanced thermal conductivity for Zn, Cu, and Cu–Zn nanofluids were 36 %, 42 %, and 48 %, respectively, with a volume concentration of 0.5 %, compared to base fluid (vegetable oil). The enhancement in viscosity for Zn, Cu, and Cu–Zn nanofluids are 47 %, 53 %, and 61 %, respectively, with a volume fraction of 0.5 % were reported.


    Author Information:

    Kumar, Mechiri Sandeep
    Research Scholar, Dept. of Mechanical Engineering, National Institute of Technology, Warangal, Telangana

    Vasu, V.
    Dept. of Mechanical Engineering, National Institute of Technology, Warangal, Telangana

    Gopal, A. Venu
    Dept. of Mechanical Engineering, National Institute of Technology, Warangal, Telangana


    Stock #: JTE20140286

    ISSN:0090-3973

    DOI: 10.1520/JTE20140286

    Author
    Title Thermal Conductivity and Viscosity of Vegetable Oil–Based Cu, Zn, and Cu–Zn Hybrid Nanofluids
    Symposium ,
    Committee D15