Nanotechnology

Researchers from University of Missouri detail new studies and findings in the area of heat transfer research

  2008 NOV 24 - (VerticalNews.com) -- "Nonequilibrium heat conduction in a nanofluid layer with periodic heat flux oil one side and specified temperature oil the other side is studied numerically. The energy equations for the nanoparticles and base fluid are nondimensionalized and the problem is described by four dimension less parameters: heat capacity ratio, volume fraction of nanoparticles, period of surface heat flux, and the Sparrow number," scientists writing in the International Journal of Heat and Mass Transfer report.

  "The Sparrow number is to describe the coupling between the energy equations for nanoparticles and base fluid. Nonequilibrium between nanoparticles and base fluid, as well as heat transfer enhancement in nanofluid, of three nanofluids (diamond-water, diamond-ethylene glycol, and copper-ethylene glycol) is investigated. The results showed that the nonequilibrium between the nanoparticles and base fluid exist for all three nanofluids at low Sparrow number and short period of surface heat flux," wrote Y.W. Zhang and colleagues, University of Missouri.

  The researchers concluded: "The results also showed that heat transfer in a liquid layer can be enhanced by adding nanoparticles to the base fluid, but the level of enhancement is not as high as those reported by using transient hot wire (THW) method."

  Zhang and colleagues published their study in International Journal of Heat and Mass Transfer (Nonequilibrium heat conduction in a nanofluid layer with periodic heat flux. International Journal of Heat and Mass Transfer, 2008;51(19-20):4862-4874).

  Additional information can be obtained by contacting Y.W. Zhang, University of Missouri, Dept. of Mech & Aerosp Engineering, Columbia, MO 65211, USA.

  The publisher of the International Journal of Heat and Mass Transfer can be contacted at: Pergamon-Elsevier Science Ltd., the Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England.

  Keywords: Emerging Technologies, Nanofluids, Nanoparticle, Nanotech, NanotechnologyHeat and Mass Transfer, University of Missouri.

  This article was prepared by VerticalNews Nanotechnology editors from staff and other reports. Copyright 2008, VerticalNews Nanotechnology via VerticalNews.com.