In this work, the temperature dependence of thermal conductivity enhancement in nanofluids containing nanorods has been studied. The nanorods of average diameter and length are synthesized using the sonochemical technique. The -wire method has been developed to measure the thermal conductivity of nanofluids. The thermal conductivity enhancement in the nanorods-in-FC72 and the nanorods-in-oil nanofluids has been experimentally found to decrease with increasing temperature, in contrast to the trend observed in nanofluids containing spherical nanoparticles. The contrary trend is attributable mainly to the particle aspect ratio.
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