Al₂O₃/TiO₂ hybrid nanofluids thermal conductivity

This research deals with experimental studies on thermal conductivity variation of Al₂O₃ and TiO₂ hybrid nanofluids with water as the base fluid. In addition, Al₂O₃ and TiO₂ nanofluid mixtures were used for evaluation. The prepared samples were tested for determination of thermal conductivity at room temperature as well as at different temperatures. A comprehensive regression analysis was accomplished to link the experimental data sets with volume fractions for all prepared new fluids, as well as with temperature variation. The experimental results were finally linked to an evaluation of Mo number and heat transfer efficiency for possible solar energy uses. Results indicated that the hybrid nanofluids possess upper thermal conductivity if related to water and can successfully replace it in heat transfer applications.