Experimental Investigation on Convective Heat Transfer of the Graphite-water Nanofluid

Convective heat transfer coefficient was measured at different volume fraction of graphite-water nano-fluids with Re in scope of 3 000—6 500 by using self-designed nano-fluid flow and convective heat transfer performance of the experimental device.The experimental results showed that graphite nano-particles improved the convection heat transfer coefficient of water;the volume fraction of graphite nano-particles in water and convective heat transfer coefficient is nearly linear relationship;Nu number increases linearly with Re increasing;the random motion of nano-particles at flow state and the thermal scattering have a significant effect on increase of convective heat transfer coefficient.