CFD simulation and experimental investigation of Al2O3/Water nanofluid in double pipe heat exchanger

فاقد چكيده فارسي

In the present work, a CFD model for investigating the heat transfer of Al2O3/Water nanofluid in double pipe heat exchanger was developed. The model is based on two-phase mixture equations in conjunction with the Standard k-ε model for turbulence. The energy equation is used to describe the heat transfer. In order to investigate the nanoparticle effect on heat transfer rate, the simulations and experiments were performed with base fluid (water/water) and nanofluid/water at countercurrent flow. The model was validated by comparing the results of CFD model and experimental measurements. The results showed that addition of nanoparticles improved heat transfer rate. The effects of hot and cold flow rates and nanoparticle concentration on heat transfer rate have been investigated too. The results have shown that heat transfer rate clearly increases with an increase in particle concentration and flow rates of cold and hot fluids.