title: Nanodiamond-based thermal fluids.
abstract: Dispersions of nanodiamond (average size ∼6 nm) within dielectric insulator mineral oil are reported for their enhanced thermal conductivity properties and potential applications in thermal management. Dynamic and kinematic viscosities-very important parameters in thermal management by nanofluids-are investigated. The dependence of the dynamic viscosity is well-described by the theoretical predictions of Einstein's model. The temperature dependence of the dynamic viscosity obeys an Arrhenius-like behavior, where the activation energy and the pre-exponential factor have an exponential dependence on the filler fraction of nanodiamonds. An enhancement in thermal conductivity up to 70% is reported for nanodiamond based thermal fluids. Additional electron microscopy, Raman spectroscopy and X-ray diffraction analysis support the experimental data and their interpretation.
authors.affiliation: Department of Materials Science and NanoEngineering, Rice University , Houston, Texas 77005, United States.
authors.forename: Jose Jaime
authors.initials: JJ
authors.lastname: Taha-Tijerina
authors.forename: Tharangattu Narayanan
authors.initials: TN
authors.lastname: Narayanan
authors.forename: Chandra Sekhar
authors.initials: CS
authors.lastname: Tiwary
authors.forename: Karen
authors.initials: K
authors.lastname: Lozano
authors.forename: Mircea
authors.initials: M
authors.lastname: Chipara
authors.forename: Pulickel M
authors.initials: PM
authors.lastname: Ajayan