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The present work involves a study on the thermal conductivity of nanoparticle-oil suspensions for three types of nanoparticles, namely, carbon nanotubes ͑CNTs͒, exfoliated graphite ͑EXG͒, and heat treated nanofibers ͑HTT͒ with PAO oil as the base fluid. To accomplish the above task, an experimental analysis is performed using a modern light flash technique ͑LFA 447͒ for measuring the thermal conductivity of the three types of nanofluids, for different loading of nanoparticles. The experimental results show a similar trend as observed in literature for nanofluids with a maximum enhancement of approximately 161% obtained for the CNT-PAO oil suspension. The overall percent enhancements for different volume fractions of the nanoparticles are highest for the CNT-based nanofluid, followed by the EXG and the HTT. The findings from this study for the three different types of carbon nanoparticles can have great potential in the field of thermal management.

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