Effect of nanoconvection due to Brownian motion on thermal conductivity of nanofluids

M. Reza Azizian, Hikmet Ş Aybar, Tuba Okutucu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

24 Citations (Scopus)

Abstract

A nanofluid is a new class of heat transfer fluids that contain a base fluid and nanoparticles. The use of additives is a technique applied to enhance the heat transfer performance of base fluids. The thermal conductivity of the ordinary heat transfer fluids is not adequate to meet today's cooling rate requirements. Nanofluids have been shown to increase the thermal conductivity and convective heat transfer performance of the base liquids. One of the possible mechanisms for anomalous increase in the thermal conductivity of nanofluids is the Brownian motions of the nanoparticles inside the base fluids. It is shown in this study that the heat diffusion assumption that has been used in the macro-and micro-composite systems is not valid in the nanofluid systems. Apart from heat diffusion the nanoconvection diffusion that it is due to the indirect effect of Brownian motion is responsible of enhancement in thermal conductivity of nanofluid systems.

Original languageEnglish
Title of host publicationProceedings of the 7th IASME / WSEAS International Conference on Heat Transfer, Thermal Engineering and Environment, HTE '09
Pages53-56
Number of pages4
Publication statusPublished - 2009
Externally publishedYes
Event7th IASME / WSEAS International Conference on Heat Transfer, Thermal Engineering and Environment, HTE '09 - Moscow, Russian Federation
Duration: 20 Aug 200922 Aug 2009

Publication series

NameProceedings of the 7th IASME / WSEAS International Conference on Heat Transfer, Thermal Engineering and Environment, HTE '09

Conference

Conference7th IASME / WSEAS International Conference on Heat Transfer, Thermal Engineering and Environment, HTE '09
Country/TerritoryRussian Federation
CityMoscow
Period20/08/0922/08/09

Keywords

  • Brownian motion
  • Heat transfer
  • Nanoconvection
  • Nanofluids
  • Thermal conductivity

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