Mixed convection of EG/NEPCM inside a lid-driven cavity with a rotating cylinder

Using the potential of nature's phenomena such as free convection phenomenon could help to cooling a piece, such as a moving hot plate in lid-driven problems. Moreover, adding modern nanostructures named nano-encapsulated phase change material (NEPCM) with ability of phase transition could greatly improve the heat transfer processes. In this study, the mixed convection of ethylene glycol (EG) and NEPCM was simulated inside a lid-driven cavity with a rotating cylinder to evaluate the contribution of Grashof number, cylinder speed, and concentration of NEPCM on the heat transfer characteristics. Hence, the findings of current numerical study indicated that the NEPCM with 6% concentration increased the mean Nusselt number by 41.7%. Moreover, the cylinder speed enhanced the mean Nusselt number by 38.7%. Finally, there was an optimum value for concentration occurred in 4% brought for Grashof number of 104.

Automated summary

Using natural phenomena like free convection and modern nanostructures called NEPCM can improve heat transfer in lid-driven problems. This study simulated mixed convection of ethylene glycol and NEPCM in a lid-driven cavity with a rotating cylinder to assess the influence of Grashof number, cylinder speed, and NEPCM concentration on heat transfer characteristics. The results showed that a 6% concentration of NEPCM increased the mean Nusselt number by 41.7%, while the cylinder speed increased it by 38.7%. Additionally, an optimum concentration of 4% was observed for a Grashof number of 104.