Effects of Alumina nanoparticles on thermal performance of a microchannel heat sink

In this work, laminar forced convective heat transfer of distilled water and Al2O3/water nanofluid withvolume fraction of 1% and 2% in a straight microchannel heat sink is studied. Single-phase and two-phase mixturemodels have been used for prediction of friction factor and heat transfer coefficients of nanofluids. Effects ofimportant parameters such as Reynolds number and nanoparticle volume fraction on the heat transfer enhancementhave been studied. The results showed that the heat transfer coefficient increases by increasing of nanofluidconcentration. It was found that the two-phase model is more precise than single-phase model. In nanofluid with1% concentration, the average relative error between experimental data and CFD results based on single-phasemodel is 26.95% while for two-phase model is 8.65%.

کلیدواژه ها:

microchannel heat sink ، nanofluid ، alumina nanoparticles ، heat transfer coefficient