This paper investigated effects of the nanoparticles velocity induced by AC electric field on the thermal conductivity enhancement of nanofluids. Using the Langevin equation, it is shown that the velocity of a Al₂O₃-nanoparticle dispersed in the w...
This paper investigated effects of the nanoparticles velocity induced by AC electric field on the thermal conductivity enhancement of nanofluids. Using the Langevin equation, it is shown that the velocity of a Al₂O₃-nanoparticle dispersed in the water is increased about 30% at the AC 300 voltage under electric field compared with Brownian velocity. Also, the thermal conductivity of Al₂O₃-water nanofluids is experimentally measured. Based on the results, we report that the thermal conductivity of the nanofluids is increased about 10% at 10㎐ under the fixed AC voltage, AC 300V.