Experimental investigation of submerged impinging jet using nanofluids

Cu-water nanofluids with high conductivities were introduced into jet cooling system as the working fluid. An experimental system was designed and built. Both the heat transfer coefficient and system pressure drop of the sample Cu-water nanofluids were measured. The effects of the volume fraction of nanoparticles, the entrance velocity, and the nozzle-to-plate distance on the heat transfer coefficient were discussed. The experimental results reveal that the suspended nanoparticles can remarkably enhance heat transfer of base liquid and incur almost no extra increase of pressure drop. In addition, the heat transfer coefficient can also be improved by the augment of entrance velocity and the suitable selection of nozzle-to-plate distance.