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Date of Publication:2013-01-01

Journal:内燃机学报

Volume:31

Issue:6

Page Number:557-563

ISSN No.:1000-0909

Abstract:This study calculates the thermal conductivities of nanofluids,as well
   as examines enhancing mechanisms of heat conduction of nanofluids
   through Molecular Dynamics simulations. The thermal conductivity of
   nanofluids is increased compared with that of base fluid,while the
   materials of nanoparticles,and volume concentration of nanoparticles
   affect the promotion degree. Molecular dynamics simulations confirm the
   absorption layer around nanoparticles,and the micro-motions of
   nanoparticles are the enhancing mechanism of heat conduction in
   nanofluids. Radical Distribution Function analysis shows that nanofluids
   present a microscopic structure characteristic which is similar to that
   of solid. The changed microscopic structure of nanofluids due to
   addition of nanoparticles is suggested to be another mechanism of heat
   conduction of nanofluids. The mechanisms of heat conduction of
   nanofluids are the basis for proposing theoretical predictions models of
   thermal conductivity of nanofluids.

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