ORCID Profile
0000-0001-6774-116X
Current Organisations
Universidade de Lisboa Instituto Superior Técnico
,
Universidade de Lisboa
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Publisher: IOP Publishing
Date: 21-07-2008
Publisher: World Scientific Pub Co Pte Lt
Date: 12-2008
DOI: 10.1142/S0219581X08005493
Abstract: This paper reports an experimental investigation into force convective heat transfer of nanofluids flowing through a cylindrical minichannel under laminar flow and constant wall heat flux conditions. S le nanofluids were prepared by dispersing different volumetric concentrations (0.2–0.8%) of nanoparticles in deionized water. The results showed that both the convective heat transfer coefficient and the Nusselt number of the nanofluid increase considerably with the nanoparticle volume fraction as well as the Reynolds number. Along with the enhanced thermal conductivity of nanofluids, the migration, interactions, and Brownian motion of nanoparticles and the resulting disturbance of the boundary layer are responsible for the observed enhancement of heat transfer coefficients of nanofluids.
Publisher: ASMEDC
Date: 2008
Abstract: Investigations on temperature dependence of surface tension, interfacial tension and viscosity a nanofluid are reported in this paper. Experimental results show that nanofluid having TiO2 nanoparticles (15 nm) in deionized water exhibit substantially smaller surface tension and oil-based interfacial tension than those of the base fluid (i.e. deionized water). These surface and interfacial tensions of this nanofluid were found to decrease almost linearly with increasing temperature. The Brownian motion of nanoparticles in base fluid was identified as a possible mechanism for reduced surface and interfacial tensions of nanofluid. The measured effective viscosity of nanofluid was found to be insignificantly higher than that of base fluid and it also decreases with increasing fluid temperature.
Publisher: IOP Publishing
Date: 02-03-2009
Publisher: IOP Publishing
Date: 12-03-2008
Publisher: Springer Science and Business Media LLC
Date: 02-07-2008
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Sohel Murshed.