Experimental investigation and proposed correlations for temperaturedependent thermal conductivity enhancement of ethylene glycol based nanofluid containing ZnO nanoparticles

Experimental study of effective thermal conductivity of zno/eg nanofluid is presented in this research. the nanofluid was prepared by dispersing zno nanoparticles in ethylene glycol using a sonicator and adding surfactant. ethylene glycol based nanofluid containing zno nanoparticle with a nominal diameter of 18 nm at different solid volume fractions (very low to high) at various temperatures was examined for the investigation. the thermal conductivity of nanofluids is experimentally measured with thw method and it is found that the thermal conductivity of nanofluids increase with the nanoparticle volume concentration and temperature. also, based on experimental values of thermal conductivity of nanofluid, three experimental models are proposed to predict thermal conductivity of nanofluids. the proposed models show reasonably excellent agreement with our experimental results.