Excellence in Research and Innovation for Humanity
%0 Journal Article
%A H. Almohammadi and  Sh. Nasiri Vatan and  E. Esmaeilzadeh and  A. Motezaker and  A. Nokhosteen
%D 2012 
%J  International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering
%B World Academy of Science, Engineering and Technology
%I International Science Index 68, 2012
%T Experimental Investigation of Convective Heat Transfer and Pressure Drop of Al2O3/Water Nanofluid in Laminar Flow Regime inside a Circular Tube
%U http://waset.org/publications/5436
%V 68
%X In the present study, Convective heat transfer
coefficient and pressure drop of Al2O3/water nanofluid in laminar
flow regime under constant heat flux conditions inside a circular tube
were experimentally investigated. Al2O3/water nanofluid with 0.5%
and 1% volume concentrations with 15 nm diameter nanoparticles
were used as working fluid. The effect of different volume
concentrations on convective heat transfer coefficient and friction
factor was studied. The results emphasize that increasing of particle
volume concentration leads to enhance convective heat transfer
coefficient. Measurements show the average heat transfer coefficient
enhanced about 11-20% with 0.5% volume concentration and
increased about 16-27% with 1% volume concentration compared to
distilled water. In addition, the convective heat transfer coefficient of
nanofluid enhances with increase in heat flux. From the results, the
average ratio of (fnf/fbf) was about 1.10 for 0.5% volume
concentration. Therefore, there is no significant increase in friction
factor for nanofluids.
%P 1750 - 1755